201004166 九、發明說明： 【發明所屬之技術領域】 尤其涉及一種基於 本發明涉及一種聲音傳輸系統 奈米碳管的聲音傳輸系統。 【先前技術】 .系挤Li傳輸系統包括有線聲音傳輪⑽及減聲音傳輸 詈、傳統的有線聲音傳輸系統—般由—聲電轉換裝 -般電聲轉換襄置組成。該聲電轉換裝置 揚聲或麥克風’該電聲轉換裝置-般爲-聽筒、 通聲轉㈣置料音㈣成電信號，並 裝置將電信號還原^聲轉換裝置’該電聲轉換 制，這種有線聲音傳輸；而：受到輸電線路的限 另，該聲音傳輪系統必須在一：電二=傳:成本較高’ 應用範圍。 貝在有電Μ下工作，限制了其 ;2線聲音傳輸系統在有線聲音傳輸系 電磁波、紅外波或微波等二 過將電信號轉換成 接收。^，上在空❹發送、傳輸並 而要將無線信號轉換成電信號，再經過電聲轉換/罢j 成聲音信號，其結構較爲趨雜。#相換裝置轉換 的接收端仍需在右當’：广 q…線聲音傳輸系統 輪無線信號時，容易對電子設備產生影響，傳 境下的應用。 ）於特殊環 6 201004166 近年來，&者光纖通jg技術的發展，新型的聲音傳輸 系統可進一步通過光發送器將電信號轉換爲光信號，通過 光纖進行傳輸，並通過光接收器將接收到的光信號轉換爲 電信號，再通過聲電轉換裝置還原成聲音信號。然而，這 種聲音傳輪m光信號代㈣統的無線錢，在接收 端仍需將光信號轉換成電信號，同樣存在結構複雜且需要 電力支持的問題。 光聲效應指當物質受到周期性强度調製的光照射時， 會産生聲音信號的現象。當物質受到光照射時，物質因吸 ，，能而又激發，並通過非輻射躍遷使吸收的光能全部或 部分轉變爲熱。如果照射的光束經過周期性的强度調製， 則在物質内產生周期性的温度變化 μ 近的媒質熱脹冷縮而產生應力（或壓力）的周 因而産生聲音信號，此種聲音信號也稱爲光聲信號。光聲 信號的頻率與光調製頻率相同，其强度和相位則决定於物 質的光子、熱學、彈性和幾何的特性。目前，利用光聲效 w製&的光聲4儀及光聲顯微鏡已經被廣泛應用於物質組 =分析檢測領域。例如’先前技術中的光聲譜儀一般包括 光原 樣σσ至及一信號檢測器。該光源一般爲一調製 的脉衝雷射源或連續f射源。該信號檢測器—般爲一麥克 風汶樣扣至中放置有待測的樣品，該樣品材料不限，可 爲氣體、液體或固體材料，如—固體粉末t生物樣品等。 5亥雷射源發射雷射照射到樣品室中的樣品上，由於光聲效 應中產生的聲能直接正比於物質吸收的光能，而不同成分 201004166 的物質在不同光波的波長處出現吸收峰值，故當具有多譜 線或連續光譜的光源以不同波長的光束相繼照射樣品時， 樣品内不同成分的物質將在與各自的吸收峰相對應的光波 波長處産生光聲信號極大值。該信號檢測器通過檢測該光 聲信號的極大值，從而判斷待測樣品的材料種類。 然而’一般材料受到光吸收能力的限制，產生的光聲 #號强度較弱，且頻率範圍在兆赫茲以上，只能通過麥克 風或壓電傳感器等換能裳置接收，故，先前技術中還沒有 利用光聲效應製造的發聲元件，及應用該發聲元件製造的 聲音傳輸系·统，使其産±的聲音信號能直接被人耳感知。 自九十年代初以來，以奈米碳管（請參見Helical microtubules of graphitic carbon, Nature, Sumio Iijima, v〇l 354, P56(1991))爲代表的奈米材料以其獨特的結構和性質 引起了人們極大的關注。近幾年來，隨著奈米碳管及太米 材料研究的不斷深入，其廣闊的應用前景不斷顯現出來;、 例如，由於奈米碳管所具有的獨特的電磁學、光學、 能，大量有關其在場發射電子源、傳感器、新子型 先子材料、軟鐵磁材料等領域的應用研究不斷被報道。妙 二:前技術中却尚未發現奈米碳管作爲發聲元件用“ 有鑒於此，提供一種結構簡單，可 ::直接發一耳感知—、:;： 【發明内容】 8 201004166 種聲音傳輸系統，其包括：一聲電轉換裝置、一電 波轉換j置及-發聲元件’該聲電轉換裝置將聲音信號轉 換爲電信號，該聲電轉換裝置與該電波轉換裝置電連接， 該電波轉換裂置將電信號轉換爲電磁波信號，該發聲元件 與該I波，!奐裝置對應且間隔設置，其中’該發聲元件包 括碳管結構’該電波轉換裝置傳遞電磁波信號至該 不米石反S結構，使該奈米碳管結構通過吸收該電磁波信號 發熱，從而加熱氣體介質發出聲波。 相較于先如技術，所述聲音傳輸系統具有以下優點： 由於所述聲音傳輸系統中的發聲元件僅由奈米碳管 、-構、=成’且在該聲音傳輪系統中’由電信號轉換成的電 磁，L號無品轉換回電信號，而係直接通過電磁波信號使 么聲凡件發出聲音被人耳感知，故該聲音傳輸系統無需包 括光電及電聲轉換裝置，其結構較爲簡單，有利於降低該 聲音傳輸系統的成本。其二，由於所述由奈来碳管結構組 成的發聲元件可通過輸入一電磁波信號發聲，&，該發聲 元件可在無電3滅下作。其三，由於奈米碳管具有較 强的電磁波吸收能力和較小的熱容，並且奈米碳管結構具 有車乂大的散熱比表面積，故該奈米碳管結構具有升溫迅 速、熱交換速度快、熱滞後小的特點，可擾動周圍空氣迅 連膨脹和收縮，進而發出可直接被人耳感知的聲音，從而 使該奈米碳管結構組成的發聲元件可在無磁的條件下工 作，且具有較好的發聲效果。其四，由於奈米碳管具有較 好的機械强度和韋刃性，故由奈米碳管組成的奈米碳管結構 9 201004166 具有較好的機械强度和韌性，描& 士 結構組成的各種形狀、尺寸二有：於製備由奈米碳管 於各種領域。 轉，“枝地應用 【實施方式】 以下將結合附圖 輸系統。 坪細說明本技術方案實施例的聲音傳 請參閱圖！，本技術方案第一實施例提供—種聲音傳 輸糸統1〇,該聲音傳輸系，統10包括一聲電轉換裝置ιι〇、 -電波轉㈣…發聲元件㈣及―支撑結構⑽。 該聲電轉換裝i 11〇與該電波轉換裝£ 12〇電連接。該電 波轉換裝置12〇與該發聲元件13()對應並間隔設置。該發 聲元件130設置在支撑結構ι4〇上。 所述聲電轉換裝置11G將聲音信號轉換成電信號，並 將該電信號傳輸至所述電波轉換裝£ 12〇。卩冑地，所述 聲電轉換褒置no可選擇爲一麥克風、話筒或壓力傳感器 等。本實施例中，該聲電轉換裝置11〇爲一麥克風。 所述電波轉換裝置120包括一調製裝置126及一電磁 波發生器124。該電磁波發生器124發出電磁波，該調製 裝置與所述聲電轉換裝置11〇電連接，並根據從聲電 轉換裝置110輸入的電信號對該電磁波進行强度或頻率的 調製，使該電磁波的强度或頻率發生變化，從而產生一電 磁波信號122。該電磁波的强度或頻率的變化正比於從所 述聲電轉換裝置110輸入的電信號的變化。該電磁波的波 長範圍包括無線電波、紅外線、可見光、紫外線、微波、 201004166 X射線及γ射線等。該電磁波信號122的平均功率密度在 1 // W/mm2〜20kW/mm2範圍内。該電磁波信號122的强度 不能太弱也不能太强’當電磁波信號122太弱時無法提供 足够的能量使發聲元件130發聲，當該電磁波信號122太 强時則會使該發聲元件130遭到破壞。優選的，該電磁波 發生器124爲一雷射發生器。該雷射發生器可爲半導體雷 射器、氣體雷射器、固體雷射器或染料雷射器。從上述雷 射發生器發出的電磁波爲一光波，該光波的波長範圍爲紫 外至遠紅外區域。經過調製裝置126的調製，該光波轉變 爲一光信號。該光信號的平均功率密度約爲10niW/inm2。 具體地，所述調製裝置126可與所述電磁波發生器I% 集成设置’或者設置於所述電磁波發生器124産生的電磁 波的傳播路徑上。當該調製裝置126與所述電磁波發生器 124集成設置時，該調製裝置126直接控制所述電磁波發 生器124發出的電磁波的强度和頻率，從而使該電磁波發 生器124直接産生與電信號的變化成比例的電磁波信號 122。當該調製裝置126設置於所述電磁波的傳播路徑上 時，該電磁波經過該調製裝置126後轉換成爲一電磁波信 號 122。 虽該電磁波發生器124爲一雷射發生器，且所述調製 裝置126與該雷射發生器集成設置時，該調製裝置126通 過—調製驅動電路直接控制該雷射發生器的雷射泵浦源從 而實現對該雷射的調製；或者於該雷射發生器的諧振腔内 °又置§周製元件改變諧振腔參數，從而改變雷射發生器的雷 11 201004166 射輪出特性實現對該雷射的調製。當該調製裝置126設置 .於所述雷射的傳播路徑上時，該調製裝置126可爲一電光 晶體。 該電波轉換裝置12〇與發聲元件130之間的距離不 限’但應保證從該電波轉換裝置12〇發出的電磁波信號122 能够傳遞至該發聲元件130表面。另，當該電磁波信號122 爲一光信號’且該電波轉換裝置12〇與該發聲元件13〇距 離較遠時，該電波轉換裝置120可進一步包括一光纖，該 一端與所述雷射發生器連接，另一端延伸至所述奈^ 石反官薄膜附近，從而使上述電磁波信號122通過光纖遠距 離傳遞至發聲元件13〇表面。當該電波轉換裝置12〇包括 一光纖時，所述調製裝置126可設置於光纖的起始端或結 束端上。 a 所述發聲元件130包括一奈米碳管結構。該奈米碳管 結構爲層狀或其它形狀，且具有較大的比表面積。所述夺 、米碳管結構包括均勻分佈的奈米碳管。該奈米碳管結構^ 的不米碳管爲無序或有序排列。具體地，該奈米碳管結構 包括一個奈米碳管薄膜、多個奈米碳管薄膜、多個奈米碳 管長線結構或其任意組合。 & 該奈米碳管薄膜爲有序的奈米碳管薄膜或無序的奈米 碳官薄膜。請參閱圖2 ,上述無序奈米碳管薄膜中的奈米 碳管爲各向同性，均勻分佈，無規則排列。所述奈米碳管 之間通過凡德瓦爾力相互吸引、纏繞，形成網絡狀結^ : 進而形成大量的微孔。該微孔的孔徑小於1〇微米。由°於所 12 201004166 =碳管的長度較長且相互纏繞’故，該奈米碳管薄膜 .，、有自支撑結構。該有序奈米碳管薄膜包括多個沿同一方 .向擇優取向排列的奈米碳管，該多個奈米碳管平行於所述 =奈米碳管薄膜表面。具體的，該有序奈米碳管薄膜可 由^奈米碳管組成的奈米碳管薄臈或一由首尾相連的 ::碳管組成的奈米碳管薄膜。請參閱圖3，該由長奈米 2官組成的奈米碳管薄臈中的奈米碳管爲相互平行且並排 «又置，相鄰兩個奈米碳管之間通過凡德瓦爾力緊密結合。 匕寺亥有序奈米碳管薄膜的長度等於其中的奈米碳管的 。請參閱圖4,該由首尾相連的奈米碳管組成的奈米 石反官薄膜包括多個首尾相連的奈米碳管束，每個奈米碳管 束具有大致相等的長度且每個奈米碳管束由多個相互平行 的不米奴g構成，所述奈米碳管束兩端通過凡德瓦爾力首 尾相連。所述奈米碳管薄膜可通過從奈米碳管陣列中直接 拉^並進-步處理獲得。所述奈米碳管結構可包括多個以 任意方向重叠設置的有序奈米碳管薄膜，相鄰的奈米碳管 薄臈中的奈米碳管形成一夾角α，且9〇。。 «亥奈米碳官長線結構包括多個首尾相連的奈米碳管束 組成的束狀結構或由多個首尾相連的奈米碳管束組成的絞 線〜構叫參閱圖5，該奈米碳管絞線結構可經過一沿奈 =石厌官長線結構長度方向的扭轉過程獲得。該多個奈米碳 官長線結構可相互平行排列或者相互交叉，從而形成一層 狀的奈米碳管結構。 另，該奈米碳管結構也可由上述奈米碳管薄膜與奈米 13 201004166 =長線結構組合形成。具體地，所述奈米碳管長線可平 2父叉的設置於所述奈米碳管薄膜的表面，從而_ — 、撑的作用，在不减小奈㈣管結構的比表面積的條件 增强奈米碳管結構的韌性。 〃 …該奈米碳管結構的厚度爲G 5奈米〜i毫米。該奈米^ :結構中的奈米碳管包括單壁奈米碳管、雙壁奈米碳管= /奈米碳管中的—種或多種。所述單絲米碳管的直徑 爲〇.5奈米〜5G奈米，所述雙壁奈米碳管的直徑爲ι 〇奈^ 5〇奈米’所述多壁奈米碳管的直徑爲15奈米〜％奈米。 、總之，所述奈米碳管結構的具體結構不限，只需滿足 以下三個條件，即：該奈米碳管結構具有較大的比表面積； 包括均勻分佈的奈米碳管；及厚度爲〇5奈米〜丨毫米。 、，由於該奈米^反管結構具有較大的比表面積，故當該奈 求碳管結構吸收光能或其它形式的電磁波的能量産二=二 後可迅速的與周圍氣體介質進行熱交換，從而使周圍空氣 加熱，造成空氣的膨脹和收縮並發出聲音。另，由於奈米 石厌官結構具有較大的比表面積，在凡德瓦爾力的作用下， 該奈米碳管結構本身有很好的粘附性，故採用該奈米碳管 結構作發聲元件130時，該發聲元件13〇可直接粘附固定 於所述支撑結構140上。另，該發聲元件13〇也可通過一 粘結劑與所述支撑結構14〇結合。 由於該奈米碳管結構包括均勻分佈的奈米碳管，該奈 米碳官結構能够均勻的加熱空氣發出聲音，從而使該發聲 元件130具有均勻的發聲效果。 14 201004166 ^爲使該奈米碳管結構具有較大的比表面積’該奈米碳 ♦管結構的厚度不能太厚，太厚則影響奈米碳管與周圍氣體 介質進行熱交換。3，該奈米碳管結構的厚度不能太薄， 太薄則該奈米碳管結構强度較差，在發聲過程中容易損 壞。優選地，所述奈米碳管結構的厚度爲〇 5奈米〜χ毫米。 可以理解，當該奈米碳管結構的厚度相對較小時，例如小 於10微米，該奈米碳管結構爲具有較高的透明度，故採用 該奈米碳管結構的發聲元件130爲透明發聲元件130，此 時，可將該發聲元件130直接設置在各種顯示裝置、手機 顯示屏的顯示表面或油晝的表面，從而達到節省空間的目 的。 所述支撐結構140主要起支撑作用，其形狀不限，任 何具有確定形狀的物體，>一墙壁或桌面，均可作爲本技 術方案第一實施例中的支撑結構14〇。具體地，該支撑結 構⑽可爲-平面或曲面結構’並具有一表面。此時，該 發聲tl件130直接設置並貼合於該支撑結構14〇的表面 上。由於該發聲元件130整體通過支撑結構14〇支撑，故 ，發聲元件uo可承受强度較高的電磁波信號122輸入， 攸而具有較高的發聲强度。另，該支撑結構14〇也可爲— 框架結構、杆狀結構或不規則形狀結構。此時，該發聲元 件130部分與該支撑結構14〇相接觸，其餘部分懸空設置。 此種设置方式可使該發聲元件13〇與空氣或周圍介質更好 地進仃熱交換。該發聲元件13〇與空氣或周圍介質接觸面 積更大，熱交換速度更快，故具有更好的發聲效率。 15 201004166 剛石該吉構140的材料不限，可爲-硬性材料，如金 ·:=材:英或木質材料所述支撑結構⑽還 、撑結構二材有::或紙麵。優選地，該 發聲元件130 h ^有 絕熱性能，從而防止該 ?産生的熱量過度的被該支撑結構140吸收， 空！發聲的目的。另，該支撑結構140優選 福㈣的表面，從而可使設置於上述支撑社構 14〇表面的發聲元株 m構 的接觸面積。 〇與空氣或其他外界介質具有更大 可义理解，當上述發聲元件13〇中的 、：撑的奈米碳管結構時，該支撐結構14。爲二= 在庫^術方案實施例採用奈米碳管結構的發聲元件13〇 ===由於奈米碳管對電磁波的吸收接近絕對黑體， =使發聲元件㈣對於各種波長的電磁波具有均一的吸 故，、^另上奈米碳管具有較小的熱容和較大的散熱面積。 日'射二"170件130中的奈米碳管受到如雷射等電磁波的 二ΓΓ、因吸收光能而受激發，並通過非輕射使 一、，此王0卩或部分轉變爲熱。奈米碳管溫度迅速升 和周圍的空氣或其他介質進行迅速的熱交換。如果 射的電磁波經過周期性的强度調製，則在奈米碳管内產 周期性的溫度變化’從而使其周圍的氣體介質也產 ::的溫度變化，造成周圍空氣或其他介質迅速的膨脹和 收、啦，從而發出聲音。本實施例聲音傳輸系統在應用時， 16 201004166 所述聲電轉換裝置110將聲信號轉換爲電信號，該電信號 通過電波轉換裝置120轉換成與電信號强度及頻率變化成 正比的電磁波信號122，該電磁波信號122被傳遞至發聲 元件130表面，當電波轉換裝置12〇發出的電磁波信號122 的頻率及强度合適，且發聲元件130周圍介質爲氣體時， 發聲元件130將所述電磁波信號122還原爲可直接被人耳 感知的聲音信號。 請參閱圖6,本技術方案第二實施例提供一種聲音傳 輸系統20 ’該聲音傳輸系統2〇包括一聲電轉換裝置21〇、 一電波轉換裝置220、一發聲元件23〇、一支撑結構24〇。 該支撑結構240爲一框架結構、杆狀結構或不規則形 狀結構。該發聲元件230部分與該支撑結構24〇相接觸， 其餘部分懸空設置，從而使聲音能够透過該發聲元件23〇 傳遞。 上述聲音傳輸系統20與第一實施例中的聲音傳輸系 統10的結構基本相似，與第一實施例中的聲音傳輸系統 10區別在於，該聲音傳輸系統20進一步包括一攏音結構 250’該攏音結構250間隔設置在所述發聲元件23〇遠離電 磁波信號222輸入的一側。該攏音結構25〇與該發聲元件 230間隔或集成設置，並形成一攏音空間’從而使發聲元 件230發出的聲波通過攏音結構25〇反射’增强該聲音傳 輸系統20的發聲效果。根據發聲元件23〇的大小，該距離 可爲1厘米〜1米。可以理解，該攏音結構25〇可爲具有一 較大表面的各種結構，如一平面結構或一曲面結構。本實 17 201004166 施例中’該攏音結構250爲-平板。該攏音結構250可通 過支架與該發聲元件23〇間隔。$，該攏音結構25〇與該 支撑結構24G也可爲—集成設置的整體，如—具有狹窄開 口的H 4發聲元件230平鋪於該腔體的開口上，從而 幵^成亥姆霍兹共振腔。該攏音結構250的材料爲木質、 塑料、金屬或玻璃等。 本技術方案實施例中，所述聲音傳輸系統中的發聲元 件發聲的頻率範圍爲1赫兹至萬赫兹。當發衫件中的 結構中的奈米礙管有序排列且奈米碳管結構的厚 度^時，發聲强度就可達到7〇分貝聲壓級(贿。當 該不米碳管結構的厚度增加時，發聲强度可進一步增强。 根據係否通過光纖傳輸，本技術方案實施例中的聲音傳輸 ==線聲音傳輸系統或無線聲音傳輸系統。另，本 强米碳管結構具有較好的勤性和機械 Ϊ = = I,結構可方便地製成各種形狀和尺 :的發聲兀件，該發聲元件可方便地應 中，如音響、手機、ΜΡ3、Μρ =樂-備 由於電磁波，尤其係雷射，可在二距^等。另， 音傳輸系統可用於遠距離信上距離傳播’該聲 過電磁波的形式遠距離傳輸。進二牛二㈤將聲音信號通 件通過電磁波照射即可發聲，故，；電：：=發聲元 可广紫外線、微波，及;射:== 可在一無電、無磁的極端環境下工作 X耷％件 本技術方案實施例提供的聲音傳輪系統具有以下優 18 201004166 點··其-，由於所述聲音傳輸系統令的發聲元件僅由奈米 .碳管結構組成，且在該聲音傳輪系統中，由電信號轉換成 的電磁波信號無需轉換回電信號，而係直接通過電磁波信 號使發聲元件發出聲音被人耳感知，故該聲音傳輸系統無 ㈤包括光電及電聲轉縣置，其結構較爲簡單，有利於降 ίΓΓ日傳輸系統的成本。其二，由於所述由奈米碳管結 t成的發聲元件可通過輸入一電磁波信號發聲，故，該 無電環境下工作。其三’由於奈米碳管具 :收能力和較小的熱容，並且奈米碳管結 散熱比表面積，故該奈米碳管結構具有升溫 1 父換速度快、熱滯後小的特點，可擾動周圍空氣 收縮’進而發出可直接被人耳感知的聲音，從 使炭管結構組成的發聲元件可在無磁的條件下工 好的機械强度和勃性，故…卡厌吕具有較 a_ 又田不、木反官組成的奈米碳營紝槿 具有較好的機械强度和韌性 ,〇 結構組成的各種形狀、尺寸的發聲元件於:=奈米碳管 於各種領域。其五，當該奈 ㈣應用 如小於1 η料止〗反β、、，口構尽度比較小時，例 用該奈米碳管::二!;炭管f構具有較高的透明度，故採 將該發聲元二直口=置2透明發聲元件，此時，可 示表在種顯示裳置、手機顯示屏的顯 所述聲;傳而達到節省空間的目的。其六， 可反射發聲元件發出的聲^包^一撤音結構’該攏音結構 么出的聲波，增强所述聲音傳輸系統的發 19 201004166 聲效果》 η綜上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施例， 自不能以此限制本案之申請專利範圍。舉凡習知本案技藝 =人士援依本發明之精神所作之等效修飾錢化，皆應涵 盍於以下申請專利範圍内。 【圖式簡單說明】 立圖1係本技術方案第一實施例聲音傳輸系統的結構示 思圖。 圖2係本技術方案第一實施例聲音傳輸系統中由相互 纏繞的奈米碳管組成的的奈米碳管薄膜的掃描電鏡照片。 、，山圖3係本技術方案第一實施例聲音傳輸系統中由長奈 米石厌s'組成的奈米碳管薄膜的掃描電鏡照片。 、圖4係本技術方案第一實施例聲音傳輪系統中由首尾 相連的奈米碳管組成的奈米碳管薄膜的掃描電鏡照片。 圖5係本技術方案第一實施例聲音傳輸系統中由首尾 相連的奈米碳管組成的奈米碳管長線結構的掃描電鏡照201004166 IX. Description of the Invention: The technical field to which the invention pertains relates in particular to a sound transmission system based on a carbon transmission tube of a sound transmission system. [Prior Art] The squeezing Li transmission system consists of a wired sound transmission wheel (10) and a reduced sound transmission 詈, a conventional wired sound transmission system, which is generally composed of an acoustic-electric conversion device. The acoustic-electrical conversion device emits a sound or a microphone, and the electro-acoustic conversion device is generally an - an earpiece, a sound-by-turn (four) sound (4) is an electrical signal, and the device restores the electrical signal to a sound conversion device. This kind of wired sound transmission; and: subject to the limitation of the transmission line, the sound transmission system must be in one: electric two = transmission: higher cost 'application range. Bell works in the presence of electricity, limiting it; the 2-wire sound transmission system converts electrical signals into reception in the wired sound transmission system, such as electromagnetic waves, infrared waves or microwaves. ^, the upper transmission and transmission in the air and the conversion of the wireless signal into an electrical signal, and then through the electro-acoustic conversion / stop into a sound signal, its structure is more complicated. The receiving end of the #phase switching device conversion still needs to be in the right when the ': wide q... line sound transmission system wheel wireless signal, it is easy to affect the electronic equipment, the application under the environment. In special ring 6 201004166 In recent years, with the development of fiber optic jg technology, the new sound transmission system can further convert electrical signals into optical signals through optical transmitters, transmit them through optical fibers, and receive them through optical receivers. The incoming optical signal is converted into an electrical signal and then restored to an acoustic signal by the acoustic-electrical conversion device. However, this kind of sound transmission m optical signal generation (four) unified wireless money, the optical signal needs to be converted into an electrical signal at the receiving end, and also has a complicated structure and requires power support. The photoacoustic effect refers to a phenomenon in which a sound signal is generated when a substance is irradiated with light of a periodic intensity modulation. When a substance is exposed to light, the substance is excited by energy, and the absorbed light energy is converted into heat in whole or in part by non-radiative transition. If the irradiated beam is subjected to periodic intensity modulation, a periodic temperature change is generated in the substance, and the medium is thermally expanded and contracted to generate a stress (or pressure) cycle, thereby generating a sound signal, and the sound signal is also called Photoacoustic signal. The frequency of the photoacoustic signal is the same as the frequency of the optical modulation, and its intensity and phase are determined by the photon, thermal, elastic and geometric properties of the material. At present, photoacoustic 4 and photoacoustic microscopy using photoacoustic effects are widely used in the field of substance group = analytical detection. For example, the prior art photoacoustic spectrometer typically includes a light source σσ to and a signal detector. The source is typically a modulated pulsed laser source or a continuous source of radiation. The signal detector is generally a sample to be tested, and the sample material is not limited, and may be a gas, a liquid or a solid material, such as a solid powder t biological sample. 5 Hailei source emits laser light to the sample in the sample chamber, because the sound energy generated by the photoacoustic effect is directly proportional to the light energy absorbed by the material, while the different components of 201004166 exhibit absorption peaks at different wavelengths of light waves. Therefore, when a light source having a multi-spectral line or a continuous spectrum sequentially illuminates a sample with beams of different wavelengths, substances of different compositions in the sample will generate photoacoustic signal maxima at wavelengths of light waves corresponding to respective absorption peaks. The signal detector determines the material type of the sample to be tested by detecting the maximum value of the photoacoustic signal. However, 'the general material is limited by the light absorbing ability, and the generated photoacoustic # is weak in intensity, and the frequency range is above megahertz. It can only be received by a transducer such as a microphone or a piezoelectric sensor. Therefore, the prior art also A sound-emitting element manufactured without using a photoacoustic effect, and a sound transmission system manufactured using the sound-emitting element, can directly sense the sound signal produced by the human ear. Since the early 1990s, nanomaterials represented by carbon nanotubes (see Helical microtubules of graphitic carbon, Nature, Sumio Iijima, v〇l 354, P56 (1991)) have been caused by their unique structure and properties. People have great concern. In recent years, with the deepening of research on carbon nanotubes and rice materials, its broad application prospects are constantly emerging; for example, due to the unique electromagnetic, optical, and energy properties of carbon nanotubes, Its application research in field emission electron sources, sensors, new sub-type precursor materials, soft ferromagnetic materials and other fields has been reported. Miao 2: In the former technology, it has not been found that carbon nanotubes are used as sounding components. "In view of this, a simple structure can be provided:: direct ear perception -,:;: [invention content] 8 201004166 kinds of sound transmission systems The method includes: an acoustic conversion device, a radio wave conversion device, and a sounding device. The acoustic electricity conversion device converts the sound signal into an electrical signal, and the sound and electricity conversion device is electrically connected to the electric wave conversion device, and the electric wave conversion device is The electric signal is converted into an electromagnetic wave signal, and the sound generating element is corresponding to and spaced apart from the I wave, and the sound generating element includes a carbon tube structure. The electric wave converting device transmits an electromagnetic wave signal to the non-Site anti-S structure. The carbon nanotube structure is heated by absorbing the electromagnetic wave signal, thereby heating the gas medium to emit sound waves. Compared with the prior art, the sound transmission system has the following advantages: since the sounding element in the sound transmission system is only by Nai The carbon tube, the structure, and the 'in the sound transmission system' are converted into electromagnetic signals by electrical signals, and the L-numbers are not converted into electrical signals. Directly through the electromagnetic wave signal, the sound of the sound is perceived by the human ear, so the sound transmission system does not need to include the photoelectric and electro-acoustic conversion device, and the structure is relatively simple, which is beneficial to reduce the cost of the sound transmission system. Second, because The sounding element composed of the carbon nanotube structure can be audible by inputting an electromagnetic wave signal, and the sounding element can be operated without electricity 3. Third, since the carbon nanotube has strong electromagnetic wave absorption capability and The small heat capacity, and the carbon nanotube structure has a large heat dissipation specific surface area, so the carbon nanotube structure has the characteristics of rapid temperature rise, fast heat exchange speed, and low thermal hysteresis, which can disturb the surrounding air to expand rapidly. And shrinking, and then emitting a sound that can be directly perceived by the human ear, so that the sounding element composed of the carbon nanotube structure can work under non-magnetic conditions and has a good sounding effect. Fourth, due to nano carbon The tube has good mechanical strength and sharp edge, so the carbon nanotube structure 9 201004166 composed of carbon nanotubes has good mechanical strength and toughness, and the & Structures of various shapes, has two dimensions: the preparation of a carbon nanotube transfer in various fields, "sticks applied [Embodiment] Hereinafter, the accompanying drawings transmission system. The detailed description of the sound transmission of the embodiment of the technical solution is shown in the figure! The first embodiment of the present technical solution provides a sound transmission system, and the sound transmission system 10 includes an acoustic conversion device ιι〇, a radio wave (four), a sounding component (4), and a support structure (10). The acoustic-electric conversion device i 11〇 is electrically connected to the radio wave conversion device. The radio wave converting device 12A is provided corresponding to the sound emitting element 13() and spaced apart. The sounding element 130 is disposed on the support structure ι4〇. The acoustic-electrical conversion device 11G converts a sound signal into an electrical signal, and transmits the electrical signal to the electric wave conversion device. Alternatively, the acoustic-electric conversion device no can be selected as a microphone, a microphone or a pressure sensor. In this embodiment, the acoustic-electrical conversion device 11 is a microphone. The radio wave converting device 120 includes a modulating device 126 and an electromagnetic wave generator 124. The electromagnetic wave generator 124 emits an electromagnetic wave, and the modulation device is electrically connected to the acoustic-electrical conversion device 11A, and modulates the intensity or frequency of the electromagnetic wave according to an electrical signal input from the acoustic-electrical conversion device 110 to make the intensity of the electromagnetic wave. Or the frequency changes to produce an electromagnetic wave signal 122. The change in the intensity or frequency of the electromagnetic wave is proportional to the change in the electrical signal input from the acoustic-electrical conversion device 110. The wavelength range of the electromagnetic wave includes radio waves, infrared rays, visible light, ultraviolet rays, microwaves, 201004166 X-rays, and gamma rays. The electromagnetic wave signal 122 has an average power density in the range of 1 // W/mm 2 to 20 kW/mm 2 . The intensity of the electromagnetic wave signal 122 should not be too weak or too strong. 'When the electromagnetic wave signal 122 is too weak, it cannot provide sufficient energy to make the sounding element 130 sound. When the electromagnetic wave signal 122 is too strong, the sounding element 130 is destroyed. . Preferably, the electromagnetic wave generator 124 is a laser generator. The laser generator can be a semiconductor laser, a gas laser, a solid laser or a dye laser. The electromagnetic wave emitted from the above-mentioned laser generator is a light wave having a wavelength ranging from ultraviolet to far infrared. After modulation by modulation device 126, the light wave is converted into an optical signal. The optical signal has an average power density of approximately 10 niW/inm2. Specifically, the modulating means 126 may be integrated with the electromagnetic wave generator 1% or disposed on a propagation path of electromagnetic waves generated by the electromagnetic wave generator 124. When the modulating device 126 is integrated with the electromagnetic wave generator 124, the modulating device 126 directly controls the intensity and frequency of the electromagnetic wave emitted by the electromagnetic wave generator 124, thereby causing the electromagnetic wave generator 124 to directly generate changes with electrical signals. A proportional electromagnetic wave signal 122. When the modulation device 126 is disposed on the propagation path of the electromagnetic wave, the electromagnetic wave passes through the modulation device 126 and is converted into an electromagnetic wave signal 122. Although the electromagnetic wave generator 124 is a laser generator, and the modulation device 126 is integrated with the laser generator, the modulation device 126 directly controls the laser pump of the laser generator through a modulation drive circuit. The source thus realizes modulation of the laser; or in the resonant cavity of the laser generator, the component of the laser is changed to change the cavity parameter, thereby changing the lightning output of the laser generator 11 201004166 Laser modulation. When the modulating means 126 is disposed on the propagation path of the laser, the modulating means 126 can be an electro-optic crystal. The distance between the radio wave converting device 12 and the sound emitting element 130 is not limited to 'but the electromagnetic wave signal 122 emitted from the electric wave converting device 12 can be transmitted to the surface of the sound emitting element 130. In addition, when the electromagnetic wave signal 122 is an optical signal 'and the radio wave converting device 12 is far away from the sound emitting element 13 ,, the electric wave converting device 120 may further include an optical fiber, the end and the laser generator The other end extends to the vicinity of the nano-refractive film, so that the electromagnetic wave signal 122 is transmitted to the surface of the sound-emitting element 13 through the optical fiber. When the radio wave converting device 12 includes an optical fiber, the modulating device 126 may be disposed at the beginning or the end of the optical fiber. a The sounding element 130 comprises a carbon nanotube structure. The carbon nanotube structure is layered or otherwise shaped and has a large specific surface area. The carbon nanotube structure includes uniformly distributed carbon nanotubes. The carbon nanotubes of the carbon nanotube structure are disordered or ordered. Specifically, the carbon nanotube structure comprises a carbon nanotube film, a plurality of carbon nanotube films, a plurality of carbon nanotube long-line structures, or any combination thereof. & The carbon nanotube film is an ordered carbon nanotube film or a disordered nano carbon film. Referring to Fig. 2, the carbon nanotubes in the above-mentioned disordered carbon nanotube film are isotropic, evenly distributed, and randomly arranged. The carbon nanotubes are attracted and entangled by van der Waals forces to form a network-like junction: a large number of micropores are formed. The pores have a pore size of less than 1 μm. The carbon nanotube film has a self-supporting structure because of the length of the carbon tube and the intertwining of the carbon tube. The ordered carbon nanotube film comprises a plurality of carbon nanotubes arranged in a preferred orientation aligned to a preferred orientation, the plurality of carbon nanotubes being parallel to the surface of the carbon nanotube film. Specifically, the ordered carbon nanotube film may be a carbon nanotube thin film composed of a carbon nanotube or a carbon nanotube film composed of an end-to-end::carbon tube. Referring to FIG. 3, the carbon nanotubes in the thin carbon nanotubes composed of long nanometers are parallel to each other and side by side, and the two adjacent carbon nanotubes pass through the van der Waals force. Closely integrated. The length of the ordered carbon nanotube film of Qisihai is equal to that of the carbon nanotubes. Referring to FIG. 4, the nano-stone anti-official film composed of end-to-end carbon nanotubes comprises a plurality of end-to-end carbon nanotube bundles, each of which has substantially the same length and each nanocarbon. The tube bundle is composed of a plurality of mutually parallel non-nano-g, which are connected end to end by Van der Waals force. The carbon nanotube film can be obtained by direct drawing from a carbon nanotube array and further processing. The carbon nanotube structure may include a plurality of ordered carbon nanotube films stacked in any direction, and the carbon nanotubes in the adjacent carbon nanotubes form an angle α and 9 〇. . «Heilemi carbon official long-line structure consists of a bundle of several carbon nanotube bundles connected end to end or a strand consisting of a plurality of carbon nanotube bundles connected end to end - see Figure 5, the carbon nanotube The twisted wire structure can be obtained through a twisting process along the length direction of the long line structure. The plurality of nanocarbon long line structures may be arranged in parallel or intersect each other to form a layer of carbon nanotube structure. Alternatively, the carbon nanotube structure may be formed by combining the above-described carbon nanotube film with a nano 13 201004166 = long-line structure. Specifically, the long carbon nanotubes of the carbon nanotubes can be disposed on the surface of the carbon nanotube film, so that the effect of the _-, struts is enhanced without reducing the specific surface area of the naphthalene structure. The toughness of the carbon nanotube structure. 〃 ... The thickness of the carbon nanotube structure is G 5 nm ~ i mm. The nanometer: the carbon nanotubes in the structure include one or more kinds of single-walled carbon nanotubes, double-walled carbon nanotubes = /nanocarbon tubes. The diameter of the monofilament carbon tube is 〇.5 nm~5G nanometer, and the diameter of the double-walled carbon nanotube is ι 〇奈^5〇 nanometer' diameter of the multi-walled carbon nanotube For 15 nm ~% nano. In short, the specific structure of the carbon nanotube structure is not limited, and only needs to satisfy the following three conditions, that is, the carbon nanotube structure has a large specific surface area; including a uniformly distributed carbon nanotube; and thickness For 〇 5 nm ~ 丨 mm. Because the nano-reverse tube structure has a large specific surface area, when the carbon tube structure absorbs light energy or other forms of electromagnetic waves, the energy production can be quickly exchanged with the surrounding gaseous medium. , thereby heating the surrounding air, causing the air to expand and contract and make a sound. In addition, since the nano-stone structure has a large specific surface area, the carbon nanotube structure itself has good adhesion under the action of van der Waals force, so the carbon nanotube structure is used for sounding. In the case of the component 130, the sounding component 13A can be directly adhered and fixed to the support structure 140. Alternatively, the sounding element 13A can be bonded to the support structure 14A by an adhesive. Since the carbon nanotube structure includes a uniformly distributed carbon nanotube, the carbon carbon structure can uniformly heat the air to emit sound, so that the sound emitting element 130 has a uniform sounding effect. 14 201004166 ^In order to make the carbon nanotube structure have a large specific surface area, the thickness of the nanocarbon ♦ tube structure should not be too thick, and too thick would affect the heat exchange between the carbon nanotubes and the surrounding gaseous medium. 3. The thickness of the carbon nanotube structure should not be too thin. If it is too thin, the carbon nanotube structure is inferior in strength and is easily damaged during the sounding process. Preferably, the carbon nanotube structure has a thickness of 〇 5 nm to χ mm. It can be understood that when the thickness of the carbon nanotube structure is relatively small, for example, less than 10 micrometers, the carbon nanotube structure has a high transparency, so the sound emitting element 130 using the carbon nanotube structure is transparently sounded. At this time, the sound emitting element 130 can be directly disposed on the display surface of various display devices, mobile phone display screens or the surface of the oil tank, thereby achieving the purpose of saving space. The support structure 140 mainly serves as a support, and its shape is not limited, and any object having a certain shape, > a wall or a table top, can be used as the support structure 14 in the first embodiment of the present technical solution. Specifically, the support structure (10) may be a -planar or curved structure' and have a surface. At this time, the sounding t1 is directly disposed and attached to the surface of the support structure 14A. Since the sound emitting element 130 is entirely supported by the support structure 14〇, the sounding element uo can withstand the input of the electromagnetic wave signal 122 with high strength, and has a high sounding intensity. In addition, the support structure 14〇 may also be a frame structure, a rod structure or an irregular shape structure. At this time, the sound emitting element 130 is partially in contact with the support structure 14A, and the remaining portion is suspended. This arrangement allows the sound producing element 13 to exchange heat with the air or surrounding medium. The sound emitting element 13 has a larger contact area with air or surrounding medium, and has a faster heat exchange rate, so that it has better sounding efficiency. 15 201004166 The material of the stone structure 140 is not limited, it can be - hard material, such as gold ·: = material: English or wood material, the support structure (10), and the support structure two materials:: or paper. Preferably, the sound producing element 130h has thermal insulation properties, thereby preventing the generated heat from being excessively absorbed by the support structure 140, empty! The purpose of vocalization. Further, the support structure 140 preferably has a surface of the surface (four), so that the contact area of the sounding element m structure provided on the surface of the support structure 14 can be made. The crucible has a greater understanding with air or other external medium, the support structure 14 when the carbon nanotube structure of the sounding element 13 is in the above. For the second embodiment, the sound-emitting element of the carbon nanotube structure is used in the embodiment of the library. 〇 === Since the absorption of electromagnetic waves by the carbon nanotubes is close to the absolute black body, the sound-emitting element (4) has uniform absorption for electromagnetic waves of various wavelengths. Therefore, the other carbon nanotubes have a smaller heat capacity and a larger heat dissipation area. The carbon nanotubes in the '130 shots' and 170 pieces of 130 are subjected to electromagnetic waves such as lasers, excited by absorption of light energy, and by non-light shots, the king is transformed into heat. The temperature of the carbon nanotubes rises rapidly and exchanges heat with the surrounding air or other medium. If the electromagnetic wave emitted is periodically intensity modulated, a periodic temperature change is produced in the carbon nanotubes, so that the surrounding gaseous medium also produces:: the temperature changes, causing rapid expansion and acceptance of the surrounding air or other medium. , and then make a sound. In the application of the sound transmission system of the present embodiment, the acoustic-to-electrical conversion device 110 converts the acoustic signal into an electrical signal, and the electrical signal is converted by the electrical wave conversion device 120 into an electromagnetic wave signal 122 proportional to the electrical signal strength and frequency variation. The electromagnetic wave signal 122 is transmitted to the surface of the sound emitting element 130. When the frequency and intensity of the electromagnetic wave signal 122 emitted by the electric wave converting device 12 are appropriate, and the medium surrounding the sounding element 130 is a gas, the sounding element 130 restores the electromagnetic wave signal 122. It is a sound signal that can be directly perceived by the human ear. Referring to FIG. 6, a second embodiment of the present invention provides a sound transmission system 20'. The sound transmission system 2 includes an acoustic-electric conversion device 21A, a radio-wave conversion device 220, a sounding element 23A, and a support structure 24. Hey. The support structure 240 is a frame structure, a rod structure or an irregular shape structure. The sound emitting element 230 is partially in contact with the support structure 24A, and the remaining portion is suspended so that sound can be transmitted through the sounding element 23A. The sound transmission system 20 described above is substantially similar in structure to the sound transmission system 10 of the first embodiment, and differs from the sound transmission system 10 of the first embodiment in that the sound transmission system 20 further includes a close-up structure 250' The tone structure 250 is spaced apart from the side on which the sounding element 23 is remote from the input of the electromagnetic wave signal 222. The sound-sounding structure 25 is spaced or integrated with the sound-emitting element 230 and forms a sound-sounding space ′ such that the sound waves emitted by the sound-emitting element 230 are reflected by the sound-sounding structure 25 to enhance the sounding effect of the sound transmission system 20. Depending on the size of the sound producing element 23, the distance may be from 1 cm to 1 m. It can be understood that the sound structure 25 can be various structures having a large surface, such as a planar structure or a curved structure.本实17 201004166 In the example, the sound structure 250 is a flat plate. The sound structure 250 can be spaced from the sounding element 23 by a bracket. $, the squeaking structure 25 〇 and the supporting structure 24G may also be an integrated arrangement, such as an H 4 sounding element 230 having a narrow opening, which is laid on the opening of the cavity, thereby forming a Helmho Resonance cavity. The material of the sound structure 250 is wood, plastic, metal or glass. In the embodiment of the technical solution, the sounding element in the sound transmission system emits sound in a frequency range of 1 Hz to 10,000 Hz. When the nanostructures in the structure of the hairline are arranged in an orderly manner and the thickness of the carbon nanotube structure is ^, the sound intensity can reach 7 〇 decibel sound pressure level (bribery. When the thickness of the carbon nanotube structure is When increasing, the vocal intensity can be further enhanced. According to whether or not the optical fiber transmission, the sound transmission in the embodiment of the technical solution == line sound transmission system or wireless sound transmission system. In addition, the strong carbon carbon tube structure has better diligence. Sexual and mechanical Ϊ = = I, the structure can be easily made into a variety of shapes and sizes: the vocal components, the sounding components can be conveniently placed, such as audio, mobile phones, ΜΡ3, Μρ = music - prepared due to electromagnetic waves, especially Laser, can be in the distance ^, etc. In addition, the sound transmission system can be used for long-distance transmission on the long-distance letter. The long-distance transmission of the sound in the form of electromagnetic waves. In the second two (5), the sound signal can be uttered by electromagnetic waves. ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The following excellent 18 201004 166 points ···, because the sound transmission system makes the sounding element only composed of a nano carbon tube structure, and in the sound transmission system, the electromagnetic wave signal converted by the electrical signal does not need to be converted back to the electrical signal, Directly through the electromagnetic wave signal, the sound emitting component emits sound and is perceived by the human ear. Therefore, the sound transmission system has no (5) including photoelectric and electro-acoustic conversion, and its structure is relatively simple, which is conducive to reducing the cost of the transmission system. Since the sound generating element formed by the carbon nanotube junction can be sounded by inputting an electromagnetic wave signal, the electric working environment is operated. The third 'because of the carbon nanotubes: the ability to receive and the smaller heat capacity, and The carbon nanotube tube has a heat-dissipating specific surface area, so the carbon nanotube structure has the characteristics of heating up 1 and the father has a fast changing speed and a small thermal hysteresis, which can disturb the surrounding air contraction and thereby emit a sound that can be directly perceived by the human ear, from the carbon tube. The sound component of the structure can work well under the condition of non-magnetic condition, and the mechanical strength and boring property of the card can be compared with that of the nano carbon camp composed of a_田田不,木反官. The mechanical strength and toughness of the 发 structure consists of various shapes and sizes of sounding elements in: = nano carbon tube in various fields. Fifth, when the nai (four) application is less than 1 η material, anti-β,, mouth structure When the degree is relatively small, the example uses the carbon nanotubes:: two!; the carbon tube f structure has a higher transparency, so the sounding element is two straight mouth = set 2 transparent sounding elements, at this time, the table can be shown The display shows the sound of the display and the display of the mobile phone; it achieves the purpose of saving space. Sixth, it can reflect the sound emitted by the sounding component, and the sound structure of the sound structure is enhanced. According to the sound transmission system of the present invention, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention. It is not possible to limit the scope of patent application in this case. Any skill in the present case = the equivalent modification of the person in accordance with the spirit of the present invention shall be within the scope of the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural diagram of a sound transmission system of a first embodiment of the present technical solution. Fig. 2 is a scanning electron micrograph of a carbon nanotube film composed of intertwined carbon nanotubes in the sound transmission system of the first embodiment of the present technical solution. Figure 3 is a scanning electron micrograph of a carbon nanotube film composed of long nano-stones s' in the sound transmission system of the first embodiment of the present technical solution. Fig. 4 is a scanning electron micrograph of a carbon nanotube film composed of a carbon nanotube connected end to end in the sound transmission system of the first embodiment of the present technical solution. Figure 5 is a scanning electron microscope photograph of a long-line structure of a carbon nanotube composed of a carbon nanotube connected end to end in the sound transmission system of the first embodiment of the present technical solution.
意圖。 6係本技術方案第二實施例聲音傳輸系統的結構示 【主要元件符號說明】 聲音傳輸系統 10, 20 聲電轉換裝置 110, 210 電波轉換裝置 120, 220 201004166 電磁波信號 122, 222 電磁波發生器 124, 224 調製裝置 126, 226 發聲元件 130, 230 支撑結構 140, 240 攏音結構 250 21intention. 6 is the structure of the sound transmission system of the second embodiment of the present invention. [Main element symbol description] Sound transmission system 10, 20 Acousto-electric conversion device 110, 210 Radio wave conversion device 120, 220 201004166 Electromagnetic wave signal 122, 222 Electromagnetic wave generator 124 , 224 modulation device 126, 226 sounding element 130, 230 support structure 140, 240 sound structure 250 21