CN101124848A - Crossover circuit for reducing impedance response variance of a speaker - Google Patents
Crossover circuit for reducing impedance response variance of a speaker Download PDFInfo
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- CN101124848A CN101124848A CNA2005800427491A CN200580042749A CN101124848A CN 101124848 A CN101124848 A CN 101124848A CN A2005800427491 A CNA2005800427491 A CN A2005800427491A CN 200580042749 A CN200580042749 A CN 200580042749A CN 101124848 A CN101124848 A CN 101124848A
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Abstract
Embodiments of the present invention are directed to crossover circuits for reducing impedance response variance of a speaker. A speaker includes at least one driver and one or more electrical components. The speaker has a baseline frequency and impedance response when no associated series resistance or impedance is connected to the speaker. A pair of terminals is used for connecting the speaker to external components. Connecting the speaker to external components results in an associated series resistance or impedance, that causes the frequency response of the speaker to vary from the baseline frequency response across various frequency ranges. A crossover circuit is connected to at least one of the pair of input terminals. The crossover circuit includes electrical components configured to reduce the impedance response variance inherent to the speaker, thus reducing variances in the frequency response caused by impedances and resistances placed in series with the speaker.
Description
The cross reference of related application
The application requires to propose on November 18th, 2004, name is called the priority that " crossover circuit (frequency dividing circuit) ", sequence number are 60/629,627 U.S. Provisional Patent Application, at this by with reference to the full text of introducing this provisional application.The application also requires to propose on November 16th, 2005, name is called " Crossover Circuit For Reducing Impedance Response Variance of aSpeaker (being used to reduce the frequency dividing circuit of loudspeaker impedance response variance) ", the sequence number priority of the unknown novel patent application of U.S. utility still, at this by with reference to introducing it in full.
Background technology
Many loud speakers include " frequency dividing circuit ", promptly a kind of electronics networking of being made up of capacitor, resistor and/or inductor.Frequency dividing circuit is divided into finite bandwidth with wide audible spectrum, to be applicable to the specific driver of single frequency (woofer, mid frequency ludspeaker, tweeter or the like).The also feasible balancing energy that is fed to each driver of frequency dividing circuit is so that handle sound property by the mode of hope.
Yet frequency dividing circuit and driver bank credit union produce impedance, and this impedance is as the function of frequency and significantly fluctuation.As a result, the tone color balance of loud speaker (tonal balance) is commonly referred to frequency response, can be subjected to non-essential resistance, for example is connected in series to the influence of another loud speaker or the loud speaker line of this loud speaker.Therefore, even other set point (for example volume) remains unchanged in fact, the sound that loud speaker is emitted also may be louder and softr in another frequency (for example 200Hz) in some frequencies (for example 2Khz).
Summary of the invention
Embodiments of the invention relate to the frequency dividing circuit that is used to reduce the loudspeaker impedance response variance.Loud speaker comprises at least one driver and one or more electronic component.When not having associated series resistance or impedance to be connected to loud speaker, loud speaker has baseline impedance and frequency response.With terminal to loud speaker is connected to outer member.Loud speaker is connected to outer member can produces associated series resistance or impedance, make the frequency response of loud speaker be different from the bareline heart rate response.Frequency dividing circuit is connected at least one terminal of above-mentioned input terminal centering.Frequency dividing circuit comprises and being configured in order to reduce because of connecting the electronic component of the frequency response deviation that outer member causes.
Above-mentioned these and other objects of the present invention and feature will be by following description and claims and are become more obvious, maybe can understand by practice of the present invention as mentioned below.
Description of drawings
Can be in order to describe in order to obtain the mode of the present invention above-mentioned and other advantage and feature, below with reference to specific embodiment of the present invention shown in the drawings, the present invention of top simple description is provided more detailed description.It should be understood that these accompanying drawings only show exemplary embodiments of the present invention, can not therefore think limiting the scope of the invention, below will utilize accompanying drawing, describe and explain the present invention with extra feature and details, in the accompanying drawing:
Figure 1A illustrates a speaker system, and this system comprises the frequency dividing circuit of the impedance response variance that reduces loud speaker.
Figure 1B illustrates the speaker system among Figure 1A, and this speaker system comprises the more detailed example embodiment of the frequency dividing circuit of the impedance response variance that reduces loud speaker.
Fig. 1 C illustrates the speaker system among Figure 1A, and this speaker system comprises another detailed example embodiment more of the frequency dividing circuit of the impedance response variance that reduces loud speaker.
Fig. 2 is illustrated under the difference configuration of speaker system, produces the graph curve of impedance in each frequency place.
Fig. 3 illustrates the curve of the bareline heart rate response of loud speaker when not having associated series resistance.
Fig. 4 illustrates for the speaker system of the difference configuration frequency response aberration curve with respect to curve among Fig. 3.
Embodiment
Embodiments of the invention relate to the frequency dividing circuit that is used to reduce the loudspeaker impedance response variance.Loud speaker comprises at least one driver and one or more electronic component.When not having associated series resistance or impedance to be connected to loud speaker, loud speaker has baseline impedance and frequency response.With terminal to loud speaker is connected to outer member.Loud speaker is connected to outer member can produces associated series resistance or impedance, this associated series resistance or impedance cause the frequency response of loud speaker to be different from the bareline heart rate response.Frequency dividing circuit is connected at least one terminal of above-mentioned input terminal centering.Frequency dividing circuit comprises and being configured in order to reduce because of connecting the electronic component of the frequency response deviation that outer member causes.
For example, Fig. 1 illustrates the frequency dividing circuit 101 of the impedance response variance that is used to reduce two-way speaker 102.Two-way speaker 102 comprises woofer 103 and tweeter 104.Woofer 103 is connected to each other by multiple circuit element with tweeter 104 and is connected to input terminal 106 and 107, and described circuit element comprises capacitor C111, inductor L112, resistor R 113, capacitor C114, reaches inductor L116.Frequency dividing circuit 101 is connected on the input terminal 106 and 107 of two-way speaker 102, and the impedance in parallel with the impedance of two-way speaker 102 is provided.
According to the component value in the two-way speaker 102, the impedance configuration (or tuning) of frequency dividing circuit 101 is become corresponding particular frequency range.In this particular frequency range, the fluctuation of the impedance that frequency dividing circuit 101 minimizing two-way speakers 102 are produced.That is to say, according to the value of capacitor 111, inductor 112, resistor 113, capacitor 114, inductor 116 and the characteristic electron parameter of unit of measurement and woofer 103 and tweeter 104, frequency dividing circuit 101 configurations (or tuning) are become to reduce the impedance fluctuations of two-way speaker 102 in the characteristic frequency section.
Fig. 2 is illustrated under the difference configuration of the speaker system that for example is similar to two-way speaker 102, produces the graph curve of impedance in each frequency place.Curve 201 is illustrated in speaker system and does not comprise when being configured to reduce the frequency dividing circuit of impedance fluctuations the frequency response of speaker system.Shown in curve 201, the impedance that speaker system produced has fluctuation in different frequency ranges.
For example, impedance fluctuations comes across among Fig. 2 with between about 4Hz shown in the frequency range 204 and the 200Hz.As shown in the figure, the impedance that speaker system produced rises to 7 ohm in the frequency range that is roughly 4Hz to 30Hz from about 3 ohm, in the frequency range that is roughly 30Hz to 60Hz from about 7 ohmmic drops to 4 ohm, rise to 8 ohm in the frequency range that is roughly 60Hz to 100Hz from about 4 ohm, and subsequently in the frequency range that is roughly 100Hz to 200Hz from about 8 ohmmic drops to 3 ohm.
More significant impedance fluctuations comes across among Fig. 2 with between about 200Hz shown in the frequency range 203 and the 10kHz.As shown in the figure, the impedance that speaker system produced rises to more than 23 ohm from about 3 ohm in the frequency range that is roughly 200Hz to 20kHz, and subsequently in the frequency range that is roughly 2kHz to 10kHz from reducing to about 6 ohm more than 23 ohm.
When curve 202 is illustrated in speaker system and comprises the frequency dividing circuit (for example frequency dividing circuit 101) that is configured to reduce impedance fluctuations, the impedance response of speaker system.This frequency dividing circuit can become to produce the effect that reduces impedance fluctuations on frequency range 203 and dispose (or tuning) by select the to have the particular characteristics parameter multiple electronic component (for example resistor, capacitor, inductor or the like) of (for example 4 ohm, 90 microfarads, 2.0 milihenries or the like).The selected electronic component of frequency dividing circuit can be one another in series and/or be connected in parallel.
Shown in curve 202, the impedance fluctuations on frequency range 204 is similar to curve 201.Yet the impedance fluctuations on frequency range 203 significantly reduces.As shown in the figure, rise to 5 ohm in the frequency range impedance that is roughly 200Hz to 10kHz from about 3 ohm, fluctuation is about 2 ohm.Therefore, in particular frequency range (frequency range 203), the impedance fluctuations (illustrating with curve 202) of speaker system that comprises configuration (or tuning) back frequency dividing circuit is significantly less than not comprising configuration (or tuning) fluctuation (illustrating with curve 201) of the same speaker system of frequency dividing circuit afterwards.Therefore, when being connected in series to series resistance or impedance on the loud speaker, this minimizing of impedance deviation can cause the corresponding minimizing of frequency response deviation.
Fig. 3 illustrates the curve 301 of the frequency response of the loud speaker that does not have associated series resistance.As shown in the figure, this frequency response is from the scope of 100Hz to 10kHz much at one, and changing value is approximately 4dB.
Fig. 4 illustrates the curve 401,402 with respect to the frequency response deviation of frequency response shown in Figure 3.Curve 401 expressions are for the same loud speaker with 8 ohm of associated series resistance, with respect to the frequency response deviation of curve 301.Curve 402 expressions are for having 8 ohm associated series resistance and comprising the same loud speaker that disposes (or tuned) frequency dividing circuit (being similar to frequency dividing circuit 101), with respect to the frequency response deviation of curve 301.As shown in Figure 4, at all frequency places that draws, the frequency response deviation (curve 402) that comprises the loud speaker that disposes (or tuned) frequency dividing circuit is all less than the frequency response deviation that does not comprise the loud speaker that disposes (or tuned) frequency dividing circuit (curve 401).Therefore, in the such frequency range of frequency range for example 203, comprise that the output characteristic parameter (for example volume) of the loud speaker that disposes (or tuned) frequency dividing circuit is more constant.
Figure 1B illustrates speaker system 102, and this speaker system comprises the more specific embodiment in order to the frequency dividing circuit 101 that reduces frequency response of loudspeaker deviation.Shown in Figure 1B, frequency dividing circuit 101 comprises inductor L151, capacitor C152 and resistor R 153.According to the characterisitic parameter of each element in the speaker system 102, the characterisitic parameter configuration (or tuning) of the element of frequency dividing circuit 101 can be become reduce impedance fluctuations, therefore also reduce the frequency response deviation.For example, when the characterisitic parameter of the element of speaker system 102 is similar to following numerical value:
C111：15μF，100V，＜10％DF
L112:1.0mH,＜0.50 ohm, 10mm * 10mm * 58mm stacked " I " core
R113:3 ohm, 10 watts
C114:4.7 μ F, 100V, wheat is drawn (Myler)
L116:0.40mH,＜0.30 ohm, hollow
Woofer 103:5 inch, 4 ohm
Tweeter 102:1 inch, 4 ohm
The characterisitic parameter configuration (or tuning) of each element in the frequency dividing circuit 101 can be become be similar to following numerical value:
L151:0.10mH,＜0.30 ohm, hollow
C132：90μF，100V，＜10％DF
R153:4 ohm, 10 watts
When near certain characteristic frequency, reaching peak value, with the impedance response equating (flatten out) of speaker system 102 with convenient impedance.Like this, the frequency response of speaker system 102 influence of the deviation of generation because series resistance as loud speaker line and other loud speaker and/or impedance are connected to speaker system 102 with regard to not being vulnerable to.Adopt frequency dividing circuit 101, this frequency dividing circuit comprises having the above element of enumerating parameter value, just can obtain the curve that is similar to curve 202 and curve 402 when series resistance and/or impedance are connected to speaker system 102.
Fig. 1 C illustrates speaker system 102, another specific embodiment more that this speaker system comprises the frequency dividing circuit 101 that reduces the loudspeaker impedance response variance.Shown in Fig. 1 C, frequency dividing circuit 101 comprises C162 and R163.The impedance that the characterisitic parameter of C162 and R163 configurable (or tuning) becomes " equating " to raise with frequency.
Therefore, the various frequency dividing circuits configurable (or tuning) among Figure 1A, Figure 1B and Fig. 1 C become to alleviate intrinsic (for example intrinsic in the loudspeaker design) impedance fluctuations of loud speaker.When impedance or resistance were connected with loud speaker, the minimizing of impedance fluctuations can cause the corresponding minimizing of frequency response deviation, thereby improved speaker performance.To those skilled in the art, after looking back this specification, apparent, frequency dividing circuit 101 can comprise the element with various characteristics parameter, and said elements can dispose by various mode.Can comprise with series connection and mode in parallel the configuration of the element of frequency dividing circuit 101 each element is connected to each other.
The present invention can implement by other particular form, and does not depart from its spirit or fundamental characteristics.The foregoing description all should be regarded as merely illustrative in all respects but not be determinate.Therefore scope of the present invention is with claims but not represent with foregoing description.The implication and the interior all changes of scope that fall into the equivalents of claims all are in the scope of claims.
Claims (20)
1. speaker system is used to reduce the impedance response variance of loud speaker, and described system comprises:
Loud speaker comprises at least one driver and one or more electronic component;
Terminal is right, is used to be connected to outer member, with the series impedance that causes being created in a plurality of frequency range fluctuations being connected of outer member; And
Frequency dividing circuit is connected at least one terminal of described input terminal centering, and described frequency dividing circuit comprises that at least one frequency range that is configured in a plurality of frequency ranges reduces the electronic component of impedance fluctuations.
2. speaker system according to claim 1, wherein said loud speaker comprises woofer and tweeter.
3. speaker system according to claim 1, wherein said input terminal is to being used to connect the loud speaker line.
4. speaker system according to claim 1, wherein said input terminal is to being used to connect other loud speaker.
5. speaker system according to claim 1, wherein said frequency dividing circuit is connected to described input terminal to last in the mode in parallel with described loud speaker.
6. speaker system according to claim 1, wherein said frequency dividing circuit comprise resistor and the capacitor that is tuned in particular frequency range minimizing impedance fluctuations.
7. speaker system according to claim 1, wherein said frequency dividing circuit comprise and are tuned to resistor, capacitor, and the inductor that reduces impedance fluctuations in particular frequency range.
8. speaker system according to claim 1, wherein said frequency dividing circuit comprise the electronic component that is configured to reduce in the frequency range of about 600Hz to 10kHz the impedance fluctuations of described loud speaker.
9. speaker system is used to reduce the frequency response deviation of loud speaker, and described system comprises:
Loud speaker comprises at least one driver and one or more electronic component, and when not having associated series resistance to be connected to described loud speaker, described loud speaker has the baseline impedance response;
Terminal is right, and described loud speaker is connected to outer member, causes producing associated series resistance with being connected of described outer member, makes the frequency response of described loud speaker be different from described bareline heart rate response in a plurality of frequency ranges; And
Frequency dividing circuit is connected at least one terminal of described input terminal centering, and described frequency dividing circuit comprises the electronic component of the intrinsic impedance response variance that is configured to reduce described loud speaker.
10. speaker system according to claim 9, wherein said loud speaker comprises woofer and tweeter.
11. speaker system according to claim 9, wherein said input terminal is to being used to connect the loud speaker line.
12. speaker system according to claim 9, wherein said input terminal is to being used to connect other loud speaker.
13. speaker system according to claim 9, wherein said frequency dividing circuit is connected to described input terminal to last in the mode in parallel with described loud speaker.
14. comprising, speaker system according to claim 9, wherein said frequency dividing circuit be tuned to resistor and the capacitor that reduces the impedance response variance of described loud speaker in particular frequency range.
15. comprising, speaker system according to claim 9, wherein said frequency dividing circuit be tuned to resistor, capacitor, and the inductor that reduces the impedance response variance of described loud speaker in particular frequency range.
16. speaker system according to claim 9, wherein said frequency dividing circuit comprise the electronic component that is configured to reduce in the frequency range of about 600Hz to 10kHz the impedance fluctuations of described loud speaker.
17. a speaker system is used to reduce the impedance response variance of loud speaker, described system comprises:
Loud speaker comprises at least one driver and one or more electronic component, and when not having associated series resistance to be connected to described loud speaker, described loud speaker has the bareline heart rate response;
Terminal is right, is used to be connected to outer member, causes producing associated series resistance with being connected of outer member, makes the frequency response of described loud speaker be different from described bareline heart rate response in a plurality of frequency ranges; And
Circuit arrangement is connected to described speaker system, is used to reduce the impedance response variance with respect to the baseline impedance response of described loud speaker.
18. speaker system according to claim 17, wherein said circuit arrangement are configured to the impedance that equating raises with frequency.
19. speaker system according to claim 17, wherein said circuit arrangement is configured to reduce to reach at the characteristic frequency place impedance of peak value.
20. speaker system according to claim 17, wherein said circuit arrangement is tuned in particular frequency range and alleviates impedance response variance.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US62962704P | 2004-11-18 | 2004-11-18 | |
| US60/629,627 | 2004-11-18 | ||
| US11/280,514 | 2005-11-16 |
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| Publication Number | Publication Date |
|---|---|
| CN101124848A true CN101124848A (en) | 2008-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800427491A Pending CN101124848A (en) | 2004-11-18 | 2005-11-17 | Crossover circuit for reducing impedance response variance of a speaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105393556A (en) * | 2014-04-30 | 2016-03-09 | 弗劳恩霍夫应用研究促进协会 | Array of electroacoustic actuators and method for producing such an array |
| CN105827281A (en) * | 2011-09-09 | 2016-08-03 | 高通股份有限公司 | Systems and methods for detecting and identifying a wireless power device |
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2005
- 2005-11-17 CN CNA2005800427491A patent/CN101124848A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105827281A (en) * | 2011-09-09 | 2016-08-03 | 高通股份有限公司 | Systems and methods for detecting and identifying a wireless power device |
| CN105827281B (en) * | 2011-09-09 | 2018-10-12 | 高通股份有限公司 | system and method for detecting and identifying wireless power device |
| CN105393556A (en) * | 2014-04-30 | 2016-03-09 | 弗劳恩霍夫应用研究促进协会 | Array of electroacoustic actuators and method for producing such an array |
| CN105393556B (en) * | 2014-04-30 | 2019-01-11 | 弗劳恩霍夫应用研究促进协会 | The method of electroacoustic brake array and manufacture array |
| US10425735B2 (en) | 2014-04-30 | 2019-09-24 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Array of electroacoustic actuators and method for producing an array |
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Open date: 20080213 |