CN104735589B - GPS-based intelligent sound box grouping volume adjusting system and method - Google Patents

Abstract

The invention discloses a GPS-based intelligent sound box grouping volume adjusting system and method. According to the invention, the position information of each sound box relative to the active area is acquired through the GPS information of each sound box and the active area in the group, then a main sound box is selected, the volume of the sound source of the main sound box which is transmitted to the active area is calculated according to the acoustic attenuation rule and the position information of the main sound box, the actual volume of the non-main sound box which is required to be kept and the volume of the non-main sound box are calculated according to the volume, the volume of the non-main sound box is adjusted according to the result, the volume of each sound box which is positioned at different positions and is transmitted to the active area is kept consistent, the tone quality is more uniform, and the auditory experience of a user is improved.

Description

A volume adjustment system and method for GPS-based smart speaker grouping

technical field

The invention relates to the field of speaker volume adjustment, in particular to a GPS (Global Positioning System, Global Positioning System)-based volume adjustment system and method for intelligent speaker grouping.

Background technique

Speakers are a relatively traditional digital product. Even Bluetooth speakers have been developed for a long time, but recently some manufacturers have launched smart speakers that can interact with mobile phones, giving this old product a new look. Interaction with mobile phones may be a relatively elementary level of smart speakers. Relying on technologies such as voice control to realize intelligence without mobile phones is a relatively advanced level of smart speakers, and may also become an important entrance to smart homes. Wang Hanhua said that speakers and TVs will definitely become the center of the family. One reason why smart audio products are promising is that as TVs become thinner and thinner, smart audio will become standard equipment. This is an imaginary space. At the same time, in the direction of intelligence, any application scenario related to "sound" can be associated with audio, not limited to music, such as voice control, doorbell and so on.

At present, smart speakers on the market can be roughly divided into two categories, design-driven "art" and "technology" oriented to connect everything. The former is mainly to play songs from local or third-party music platforms after connecting the smart phone with WiFi or Bluetooth. But some products are designed with enough style, and the price is naturally high. Compared with "artwork", there are many kinds of smart speakers in the technology category. Most of them make appropriate compromises in appearance design, and then use functions to please users. Such products generally cooperate with domestic music platforms and "bind" a music database. At the same time, voice control is added, which can quickly switch songs and even link other home appliances in the future.

Among the smart speakers currently on the market, Sonos and LG have similar group volume adjustments. According to observation and deduction, it is found that the Sonos group volume is equal to the average volume of all speakers in the group. LG's volume adjustment principle is similar, but it adds a channel selection function to a single speaker. Such a method for calculating the volume of the combined speakers is too simple and idealized, and cannot accurately reflect the actual volume of the combined speakers, so that intelligent and accurate adjustment of the combined speakers cannot be performed.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a volume adjustment system based on GPS-based intelligent speaker grouping, which makes the sound volume (sound pressure) transmitted to the user's active area by each speaker in the group in different positions ) are consistent in size, the sound quality is more uniform, and the user's listening experience is improved.

Another object of the present invention is to provide a volume adjustment method based on GPS-based intelligent speaker grouping, by which the sound volume (sound pressure) of each speaker in the group in different positions is transmitted to the user's active area remains consistent, and the sound quality is consistent. More uniform, improving the user's listening experience.

The first object of the present invention is achieved through the following technical solutions: a volume adjustment system based on GPS-based intelligent speaker grouping, comprising:

The GPS module placed on each speaker in the group is used to obtain the GPS information of each speaker in the group;

The GPS module placed in the activity area is used to obtain the GPS information of the activity area;

The control unit is used to select one of the speakers in the group as the main speaker according to the GPS information of each speaker in the group and the activity area, and then obtain the volume of the main speaker to the activity area according to the law of acoustic attenuation, and then transmit it to the activity area according to the main speaker. The volume of the area and the GPS information of the non-main speakers and the active area, according to the law of acoustic attenuation, the volume of each non-main speaker needs to be adjusted, and finally generate a control signal for controlling the volume of each speaker in the group;

And the volume adjustment unit arranged on each speaker in the group is used to adjust the volume of each speaker in the group according to the control signal sent by the control unit, so that the volume transmitted by each speaker in the group to the active area is consistent.

Preferably, the control unit and the GPS module in the active area are set in the mobile terminal placed in the active area, and the GPS modules placed on each sound box in the group are placed on each sound box in the group and have GPS information acquisition function mobile terminal.

Preferably, the control unit is respectively connected to the GPS module placed on each sound box in the group, the GPS module placed in the activity area, and the volume adjustment unit set on each sound box in the group through the network.

Preferably, the volume adjustment unit on each speaker in the group is a volume adjustment knob provided on the group speaker.

Preferably, the control unit is also connected with a display module for displaying the adjusted volume of each speaker in the group and the actual volume of the active area.

The second object of the present invention is achieved through the following technical solutions: a volume adjustment method based on GPS-based smart speaker grouping, the steps are as follows:

Obtain the GPS information of each speaker and activity area in the group;

According to the GPS information of each speaker in the group and the activity area, select one of the speakers in the group as the main speaker;

According to the GPS information of the main speaker and the activity area, and according to the law of acoustic attenuation, the volume transmitted from the main speaker to the activity area is obtained;

According to the volume transmitted from the main speaker to the active area and the GPS information of the non-main speakers and the active area, the volume to be adjusted for each non-main speaker is calculated according to the law of acoustic attenuation, and then the corresponding non-main speakers are adjusted according to the calculated volume.

Preferably, according to the GPS information of each speaker in the group and the activity area, the speaker with the closest distance to the activity area is selected as the main speaker of the group.

Preferably, according to the GPS information of the main speaker and the activity area, the volume L _p of the main speaker to the activity area is calculated according to the following sound attenuation formula in the air:

_Lp = _Lw -K+DIm- _Ae ;

Among them, L _p is the sound pressure transmitted from the main speaker to the active area; L _w is the sound pressure of the sound source of the main speaker; DIm is the directivity factor; K is the divergent attenuation of the sound pressure from the main speaker to the active area, K = 10log(10,4π)+20log(10,r), r is the distance between the active area and the main speaker; A _e is the additional attenuation of the sound pressure from the main speaker to the active area, including the sound caused by air absorption Pressure attenuation A _a , obstacle additional attenuation, ground additional attenuation and meteorological additional attenuation;

Preferably, according to the volume transmitted from the main speaker to the active area and the GPS information of the non-main speaker and the active area, the volume L _wn to be adjusted for each non-main speaker is calculated according to the following sound attenuation formula in the air:

L _wn = L _p -K _n +DIm-A _en , n=1,2,...N;

Among them, L _wn is the sound pressure of each non-main speaker sound source, N is the number of non-main speakers; L _p is the sound pressure transmitted from the main speaker to the active area; DIm is the directivity factor; K _n is the sound pressure from each non-main speaker The divergent attenuation of the main speaker to the active area, K _n = 10log(10,4π)+20log(10,r _n ), r _n is the distance between the active area and each non-main speaker; A _en is the sound pressure Additional attenuation in the process of propagating from each non-main speaker to the active area, including sound pressure attenuation A _an caused by air absorption, additional attenuation of obstacles, additional attenuation of the ground and additional attenuation of weather.

Preferably, the steps also include obtaining the actual volume of the active area through the power superposition method as:

Wherein L ₁ =L ₂ =...=L _M is the sound pressure transmitted to the active area by each speaker in the group; M is the total number of speakers in the group.

Compared with the prior art, the present invention has the following advantages and effects:

(1) The present invention obtains the position information of each sound box relative to the active area through the GPS information of each sound box and the active area in the group, then selects a main sound box, and calculates the sound source of the main sound box according to the acoustic attenuation law and the position information of the main sound box The actual volume transmitted to the active area, according to the volume, through the acoustic attenuation law and the location information of other non-main speakers and the active area, calculate the volume that should be transmitted to the active area by the non-main speakers to maintain the same level as the main speakers. The volume of the active area requires the actual volume of the non-main speakers, and the actual volume of each non-main speaker is adjusted according to the result, so that the volume of each speaker at different positions in the speaker grouping system to the active area remains consistent and the sound quality is consistent. More uniform, improve the user's listening experience.

(2) In the present invention, a mobile terminal such as a smart phone or a tablet computer can be used as a control unit, and the intelligent adjustment of the volume can be conveniently realized through the mobile terminal in the active area. In addition, in the present invention, a matching mobile terminal can be directly placed on each speaker of the speaker system, and the GPS information of the speakers in the group can be obtained through the mobile terminal, and the GPS information is associated with the corresponding speaker, and the mobile terminal can conveniently realize the grouping. The position acquisition of each speaker does not need to separately install a GPS module on each speaker in the group, which saves the cost of use, and can make human-computer interaction more convenient through the mobile terminal.

Description of drawings

Fig. 1 is a structural block diagram of the volume adjustment system of the present invention.

Fig. 2 is a flowchart of the volume adjustment system of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example 1

As shown in Figure 1, this embodiment discloses a volume adjustment system based on GPS-based intelligent speaker grouping, including:

The GPS module placed on each sound box in the group is used to obtain the GPS information of each sound box in the group. In this embodiment, a mobile terminal with GPS information acquisition function placed on each sound box in the group can be used as each sound box in the group. The GPS module on the phone; when the speaker is turned on, the device information of the speaker is obtained through the network. The mobile terminal placed on each speaker in the group obtains the GPS information of the speaker through the supporting client software, and associates the GPS information with the corresponding group speaker.

The GPS module placed in the active area is used to obtain the GPS information of the active area. In this embodiment, a mobile terminal with GPS function placed in the active area can be used as the GPS module placed in the active area.

The control unit is used to obtain the position information of each speaker in the group and the activity area according to the GPS information of each speaker in the group and the activity area, select one of the speakers in the group as the main speaker, and then obtain the transmission information of the main speaker according to the law of acoustic attenuation The volume to the active area, and then according to the volume of the main speaker to the active area and the GPS information of the non-main speakers and the active area, according to the law of acoustic attenuation, the volume of each non-main speaker needs to be adjusted, and finally generate a group for control The control signal of the volume of each speaker in the group; the control unit is also connected with a display module, through which the adjusted volume of each speaker in the group and the actual volume of the active area are displayed. In this embodiment, the control unit is a software module installed in the mobile terminal. The software module can calculate the non-main speaker and the GPS information of the active area according to the volume transmitted from the main speaker to the active area, and calculate the non-main speaker and the active area according to the law of acoustic attenuation. The volume of the main speaker needs to be adjusted, and a control signal corresponding to controlling the volume of each speaker in the group is generated. Wherein the mobile terminal may be the same as the mobile terminal used to acquire the GPS information of the activity area, and the mobile terminal may be a smart phone or a tablet computer.

And the volume adjustment unit arranged on each speaker in the group is used to adjust the volume of each speaker in the group according to the control signal sent by the control unit, so that the volume transmitted by each speaker in the group to the active area is consistent. In this embodiment, the volume adjustment unit on each speaker in the group is a volume adjustment knob provided on each speaker.

In this embodiment, the control unit in the smart phone terminal is respectively connected with the GPS module placed on each sound box in the group, the GPS module placed in the active area, and the volume adjustment unit arranged on each sound box in the group through the wireless network. communicate through a wireless network.

As shown in Figure 2, this embodiment discloses a volume adjustment method based on GPS-based intelligent speaker grouping realized by the above adjustment system, the steps are as follows:

Obtain the GPS information of each speaker in the group and the active area; in this embodiment, each speaker in the group obtains the GPS information through the GPS module provided on it, and determines the position information of each speaker in the group.

According to the GPS information of each speaker in the group and the activity area, one of the speakers in the group is selected as the main speaker; in this embodiment, the speaker with the shortest distance from the activity area is selected as the main speaker of the group. Of course, other speakers in the group can also be used as the main speakers.

According to the GPS information of the main speaker and the activity area, the volume L _p transmitted from the main speaker to the activity area is obtained according to the following sound attenuation formula in the air:

_Lp = _Lw -K+DIm- _Ae ;

Among them, L _p is the sound pressure transmitted from the main speaker to the active area; L _w is the sound pressure of the sound source of the main speaker; DIm is the directivity factor, which is used to indicate whether there is a reflective surface near the sound source (the ground is considered separately), and each increase A reflective surface increases 3dB; K is the divergent attenuation of the sound pressure from the main speaker to the active area, K=10log(10,4π)+20log(10,r), r is the distance between the active area and the main speaker The distance can be obtained through the GPS information of the active area and the main speaker; A _e is the additional attenuation in the process of sound pressure propagating from the main speaker to the active area, including the sound pressure attenuation A _a caused by air absorption, additional attenuation of obstacles, ground Additional attenuation and meteorological additional attenuation. The sound pressure attenuation A _a caused by air absorption is related to frequency, air pressure, temperature and humidity. In the frequency range of 125-12500 Hz and the temperature is 20°C, the sound pressure attenuation A _a caused by air absorption is:

where h is the relative humidity of the air and f is the sound frequency.

According to the volume of the main speaker to the active area and the GPS information of the non-main speakers and the active area, calculate the volume of each non-main speaker according to the law of acoustic attenuation, and then adjust the corresponding non-main speakers according to the calculated volume, so that The volume of each non-main speaker into the active area is the same as the volume of the main speaker into the active area. The details are as follows: According to the volume transmitted from the main speaker to the active area and the GPS information of the non-main speakers and the active area, the volume L _wn to be adjusted for each non-main speaker is calculated according to the following sound attenuation formula in the air:

L _wn = L _p -K _n +DIm-A _en , n=1,2,...N;

Among them, L _wn is the sound pressure of each non-main speaker sound source, N is the number of non-main speakers; L _p is the sound pressure transmitted from the main speaker to the active area; DIm is the directivity factor; K _n is the sound pressure from each non-main speaker Divergent attenuation in the process of the main speaker propagating to the active area, K _n =10log(10,4π)+20log(10,r _n ), r _n is the distance between the active area and each non-main speaker, through the active area and each The GPS information of the non-main speakers can be obtained; A _en is the additional attenuation during the sound pressure propagation from each non-main speaker to the active area, including the sound pressure attenuation A _an caused by air absorption, additional attenuation of obstacles, additional attenuation of the ground and Weather additional attenuation. where A _an is:

where h is the relative humidity of the air and f is the sound frequency.

In this embodiment, the actual volume of the active area obtained through the power superposition method is:

Where L ₁ =L ₂ =...=L _M =L _p is the sound pressure transmitted to the active area by each speaker in the group; M is the total number of speakers in the group.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplification should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (9)

1. A kind of 1. sound volume regulating system of the intelligent sound box packet based on GPS, it is characterised in that including：

   The GPS module on each audio amplifier in packet is placed in, for obtaining the GPS information of each audio amplifier in packet；

   The GPS module of zone of action is placed in, for obtaining the GPS information of zone of action；

   Control unit, for according to the GPS information of each audio amplifier and zone of action in packet, choosing one of packet audio amplifier For main sound box, the volume that main sound box travels to zone of action then is got according to acoustic attenuation rule, then according to master Audio amplifier travels to the volume and the GPS information of non-main sound box and zone of action of zone of action, according to acoustic attenuation rule The volume that each non-main sound box needs to adjust is obtained, ultimately produces the control for each audio amplifier volume in control packet Signal；

   And the sound volume regulation unit in packet on each audio amplifier is arranged at, for the control signal pair sent according to control unit The volume of each audio amplifier is adjusted in packet so that each audio amplifier travels to the volume one up to zone of action in packet Cause.
2. 2. the sound volume regulating system of the intelligent sound box packet according to claim 1 based on GPS, it is characterised in that described Control unit and the GPS module of zone of action are arranged in the mobile terminal for being placed in zone of action, it is described be placed in packet in it is each GPS module on audio amplifier is the mobile terminal that there is GPS information to obtain function being placed in packet on each audio amplifier.
3. 3. the sound volume regulating system of the intelligent sound box packet according to claim 1 or 2 based on GPS, it is characterised in that institute State control unit by network respectively be placed in GPS module in packet on each audio amplifier, be placed in the GPS module of zone of action with And it is arranged at the sound volume regulation unit connection in packet on each audio amplifier.
4. 4. the sound volume regulating system of the intelligent sound box packet according to claim 1 based on GPS, it is characterised in that packet Sound volume regulation unit on interior each audio amplifier is the volume adjustment knob being arranged on packet audio amplifier.
5. 5. the sound volume regulating system of the intelligent sound box packet according to claim 1 based on GPS, it is characterised in that described Control unit is also associated with for showing volume and zone of action actual volume size in packet after each audio amplifier regulation Display module.
6. 6. a kind of volume adjusting method of the intelligent sound box packet based on GPS, it is characterised in that step is as follows：

   Obtain the GPS information of each audio amplifier and zone of action in packet；

   According to the GPS information of each audio amplifier and zone of action in packet, it is main sound box to choose one of audio amplifier in packet；

   According to main sound box and the GPS information of zone of action, according to acoustic attenuation rule, get main sound box and travel to behaviour area The volume in domain；

   The volume and the GPS information of non-main sound box and zone of action of zone of action are traveled to according to main sound box, according to sound Learn attenuation law and calculate the volume that each non-main sound box needs to adjust, it is then corresponding according to the volume regulation being calculated Non- main sound box.
7. 7. the volume adjusting method of the intelligent sound box packet according to claim 6 based on GPS, it is characterised in that according to The GPS information of each audio amplifier and zone of action in packet, the closest audio amplifier in selected distance zone of action are the packet Main sound box.
8. 8. the volume adjusting method of the intelligent sound box packet according to claim 6 based on GPS, it is characterised in that according to Main sound box and the GPS information of zone of action, calculate main sound box according to the aerial decay formula of following sound and travel to The volume L of zone of action_p：

   L_p=L_w-K+DIm-A_e；

   Wherein L_pIt is the acoustic pressure that main sound box travels to zone of action；L_wFor the acoustic pressure of main sound box sound source；DIm is directivity factor；K For acoustic pressure from main sound box travel to zone of action during diverging decay, K=10log (10,4 π)+20log (10, r), r be The distance between zone of action and main sound box；A_eFor acoustic pressure from main sound box travel to zone of action during additional attenuation, bag Include acoustic pressure decay A caused by air absorption_a, barrier additional attenuation, ground additional attenuation and meteorological additional attenuation.
9. 9. the volume adjusting method of the intelligent sound box packet according to claim 6 based on GPS, it is characterised in that described Step also includes getting zone of action volume actual size by the power addition method：

   <mrow> <msub> <mi>L</mi> <mo>&amp;Sigma;</mo> </msub> <mo>=</mo> <mn>10</mn> <msub> <mi>log</mi> <mn>10</mn> </msub> <mrow> <mo>(</mo> <msup> <mn>10</mn> <mfrac> <msub> <mi>L</mi> <mn>1</mn> </msub> <mn>10</mn> </mfrac> </msup> <mo>+</mo> <msup> <mn>10</mn> <mfrac> <msub> <mi>L</mi> <mn>2</mn> </msub> <mn>10</mn> </mfrac> </msup> <mo>+</mo> <mo>...</mo> <mo>+</mo> <msup> <mn>10</mn> <mfrac> <msub> <mi>L</mi> <mi>M</mi> </msub> <mn>10</mn> </mfrac> </msup> <mo>)</mo> </mrow> <mo>;</mo> </mrow>

   Wherein L₁=L₂=...=L_MThe acoustic pressure of zone of action is traveled to for each audio amplifier in packet；M is the total of audio amplifier in packet Number.