WO2022077681A1 - 音频参数自适应调整方法和音频系统 - Google Patents

音频参数自适应调整方法和音频系统 Download PDF

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Publication number
WO2022077681A1
WO2022077681A1 PCT/CN2020/128315 CN2020128315W WO2022077681A1 WO 2022077681 A1 WO2022077681 A1 WO 2022077681A1 CN 2020128315 W CN2020128315 W CN 2020128315W WO 2022077681 A1 WO2022077681 A1 WO 2022077681A1
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Prior art keywords
audio
data
volume
configuration parameters
speaker box
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PCT/CN2020/128315
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English (en)
French (fr)
Inventor
王洪兴
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瑞声声学科技(深圳)有限公司
瑞声光电科技(常州)有限公司
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Publication of WO2022077681A1 publication Critical patent/WO2022077681A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems

Definitions

  • the invention relates to the field of electro-acoustic conversion, in particular to an audio parameter adaptive adjustment method and audio system applied to electronic sound box products.
  • the speaker box of the related art includes a rear cavity with a variable volume, and the rear cavity of the speaker box can be expanded, so that the acoustic performance of the speaker box is flexible and changeable, adapts to various application scenarios, and provides a good user experience.
  • the rear cavity of the speaker box of the related art can be expanded, and different audio parameter settings are required under different rear cavity volumes. If only fixed audio parameter settings are used, then under certain expanded rear cavity volumes , the sound quality will deteriorate, and even the speaker box will be irreversibly damaged.
  • the purpose of the present invention is to overcome the above technical problems, and to provide an audio parameter adaptive adjustment method and audio system with good acoustic performance.
  • the present invention provides an adaptive adjustment method of audio parameters, which is applied to an audio system with a speaker box, the speaker box has a back cavity with a variable volume, and the method includes the following steps:
  • Step S1 acquiring volume data of the back cavity
  • Step S2 adjusting the audio configuration parameters of the audio system according to the acquired volume data, so that the audio configuration parameters are adapted to the acquired volume;
  • Step S3 Process the audio data according to the adjusted audio configuration parameters, and emit the processed audio data through the speaker box.
  • the speaker box includes a sensor, and the audio system obtains the volume data through the sensor.
  • the senor is a contact sensor or a non-contact sensor.
  • the senor is a potentiometer
  • the volume of the back cavity corresponds to the output data of the potentiometer one-to-one.
  • the senor is an infrared distance sensor
  • the volume of the rear cavity corresponds to the output data of the infrared distance sensor one-to-one.
  • the audio system further comprises a microphone and a processor electrically connected to the microphone,
  • the audio parameter adaptive adjustment method further includes the following steps:
  • Step S01 before the speaker box plays audio, play the test audio of a fixed frequency and a fixed sound amplitude;
  • the step S1 includes the following steps:
  • Step S11 the microphone acquires the audio signal of the speaker box playing the test audio and converts it into test audio data
  • Step S12 the processor calculates the volume data according to the acoustic parameters of the test audio data.
  • the processor calculates the volume data according to the sound amplitude of the test audio data acquired by the microphone.
  • the acoustic parameter is the sound pressure level of the test audio data.
  • the present invention also provides an audio system, which applies the audio parameter adaptive adjustment method described in any one of the above, and the audio system further includes:
  • a processor configured to receive an audio input signal and process the audio input signal to obtain audio data, adjust the audio configuration parameters of the audio system according to the acquired volume data, and adjust the audio configuration parameters according to the adjusted audio configuration parameters processing and outputting the audio data;
  • the amplifier is used for receiving the audio data output by the processor, performing signal amplification processing on the audio data, and outputting the audio data to the speaker box.
  • the processor includes:
  • a rear cavity state parameter acquisition module for receiving the volume data
  • a back cavity state determination module configured to compare the received volume data with the pre-stored volume data, and start updating the audio configuration parameters if the two compared volume data are different;
  • an audio processing configuration storage unit configured to store a plurality of the audio configuration parameters, and the audio configuration parameters are in one-to-one correspondence with the volume data;
  • an audio parameter configuration control module configured to perform a pairing search on the audio configuration parameters stored in the audio processing configuration storage unit according to the received volume number, and perform parameter configuration on the paired audio configuration parameters found;
  • An audio processing module configured to process the received audio input signal according to the audio configuration parameter to obtain the audio data.
  • the audio parameter adaptive adjustment method and audio system of the present invention include steps: step S1, acquiring volume data of the rear cavity; step S2, adjusting the audio frequency according to the acquired volume data The audio configuration parameter of the system, so that the audio configuration parameter is adapted to the acquired volume; Step S3, the audio data is processed according to the adjusted audio configuration parameter, and the processed audio data is passed through The speaker box emits sound.
  • the method obtains the paired audio configuration parameters by automatically processing the volume data of the rear cavity, so that the acoustic performance of the speaker box is good.
  • FIG. 1 is a block diagram of a flowchart of a method for adaptively adjusting audio parameters according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of the sensor and the initial state of the back cavity according to the first embodiment of the present invention
  • FIG. 3 is a schematic diagram of the sensor and the expanded state of the back cavity according to the first embodiment of the present invention
  • FIG. 4 is a flowchart of a method for adaptively adjusting audio parameters according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of an audio system of the present invention.
  • FIG. 6 is a schematic structural diagram of a processor of an audio system of the present invention.
  • Embodiment 1 of the audio system of the present invention is a schematic structural diagram of Embodiment 1 of the audio system of the present invention.
  • FIG. 8 is a schematic structural diagram of Embodiment 2 of the audio system of the present invention.
  • the present invention provides a method for self-adapting audio parameters.
  • the method for self-adapting audio parameters is applied to an audio system having a speaker box with a variable-volume rear cavity.
  • the audio parameter adaptive adjustment method includes the following steps:
  • Step S1 acquiring volume data of the rear cavity.
  • variable volume of the rear cavity can cause volume changes through structural changes of the rear cavity, thereby changing the acoustic performance of the speaker box.
  • the back cavity is used to improve the low frequency acoustic performance of the speaker cabinet.
  • the audio parameter adaptive adjustment method of the present invention can also be applied to the variable volume front cavity of the speaker box.
  • the speaker enclosure includes a sensor through which the audio system obtains the volume data.
  • the sensor is installed in the back cavity to sense and transmit the volume of the back cavity.
  • the sensor can also be installed outside the rear cavity, for example, the outer wall of the rear cavity or the housing of the speaker box can be installed, and the sensor does not contact the rear cavity components, and the sensor can monitor the Movement of the movable part of the rear chamber.
  • the volume change of the rear cavity is realized by the movement of the movable part.
  • the senor is a contact sensor or a non-contact sensor.
  • the sensor is a potentiometer, and the volume of the back cavity is in one-to-one correspondence with the output data of the potentiometer.
  • the sensor is an infrared distance sensor, and the volume of the rear cavity corresponds to the output data of the infrared distance sensor one-to-one.
  • Using the infrared distance sensor does not affect the structural deformation of the rear cavity due to the volume change, is easy to install and design the rear cavity, and can accurately measure the distance without being affected by factors such as air pressure caused by volume changes.
  • the use of the infrared distance sensor can directly monitor the movement of the movable part to the rear cavity or monitor the distance between the movable part and an external part.
  • the infrared distance sensor can directly monitor the movement of the movable part of the rear cavity, and the specific process is as follows:
  • FIG. 2 is a schematic diagram of the sensor and the initial state of the back cavity according to the first embodiment of the present invention.
  • the speaker box a1 is provided with a rear cavity a10.
  • the infrared distance sensor a11 is fixed in the rear cavity a10, and is disposed opposite to the movable part a101.
  • the infrared distance sensor a11 measures the distance from the movable part a101 as d1.
  • d1 corresponds to the volume of the initial state of the back cavity a10 one-to-one.
  • FIG. 3 is a schematic diagram of the sensor and the expanded state of the back cavity according to the first embodiment of the present invention.
  • the movable part a101 moves in a direction away from the infrared distance sensor a11 to realize volume expansion of the rear cavity a10.
  • the infrared distance sensor a11 measures the distance from the movable member a101 as d2.
  • d2 corresponds to the volume of the expanded state of the back cavity a10 one-to-one.
  • Step S2 Adjust the audio configuration parameters of the audio system according to the acquired volume data, so that the audio configuration parameters are adapted to the acquired volume.
  • the size of the volume of the rear cavity is matched with the audio configuration parameters one by one, and the corresponding relationship between the volume and the audio configuration parameters is set in advance, and is realized by a look-up table, which can reduce the The processing computing time and computing hardware configuration of the audio system.
  • the step S2 enables the audio system to automatically switch to the adapted audio parameter setting after the audio system recognizes the state of the back cavity, thereby avoiding manual setting by the user. If it is set manually by the user, it is easy to generate a parameter mismatch error, which will lead to a decrease in sound quality, even damage to the speaker box, and a bad user experience.
  • Step S3 Process the audio data according to the adjusted audio configuration parameters, and emit the processed audio data through the speaker box.
  • the audio configuration parameters of the audio system are adjusted and the audio input signal is processed by using the audio configuration parameters, so that the speaker box can accurately play the sound.
  • FIG. 4 is a flowchart of a method for adaptively adjusting audio parameters according to Embodiment 2 of the present invention.
  • the difference between the audio parameter adaptive adjustment method of the second embodiment and the audio parameter adaptive adjustment method of the first embodiment is that the acquisition of the volume data of the rear cavity in the step S1 adopts a microphone method.
  • the audio system further includes a microphone and a processor electrically connected to the microphone.
  • the audio system is a mobile phone, and the mobile phone is equipped with a microphone.
  • the audio parameter adaptive adjustment method includes the following steps:
  • Step S01 before the speaker box plays audio, play test audio with a fixed frequency and a fixed sound amplitude.
  • Step S1 acquiring volume data of the rear cavity.
  • the step S1 includes the following steps:
  • Step S11 the microphone acquires the audio signal of the speaker box playing the test audio and converts it into test audio data.
  • Step S12 the processor calculates the volume data according to the acoustic parameters of the test audio data.
  • Using the microphone to obtain the audio signal enables the audio system to directly use the existing speaker box without installing the sensor in the back cavity of the speaker box during manufacture, and also does not require The sensor needs to be led out, which is easier to assemble and implement the audio system.
  • the processor calculates the volume data according to the sound amplitude of the test audio data acquired by the microphone.
  • the acoustic parameter is the sound pressure level (English: Sound Pressure Level, SPL for short) of the test audio data.
  • the most commonly used physical quantity for sound measurement is sound pressure, but the size of sound pressure is usually described by sound pressure level.
  • sound pressure level is not limited to sound pressure level, other measured acoustic parameters are also possible.
  • the sound pressure level at a certain frequency is different, and when the volume of the rear cavity is larger, under the same voltage , the sound pressure level SPL at low frequencies (eg at 200Hz) will be higher.
  • the low-frequency loudness (ie the sound pressure level SPL) of the speaker box is positively correlated with the volume of the rear cavity.
  • the volume of the rear cavity is very small, and the positive correlation between the low-frequency loudness and the volume of the rear cavity is very obvious.
  • the audio system before playing music each time, the audio system is used to set a pre-sent signal of a frequency, and then the audio system is used to receive the sound with the microphone, and the determination is made according to the amplitude of the sound.
  • the microphone solution of the second embodiment can avoid the use of additional sensors, and save the space and cost of the audio system and the speaker box.
  • Step S2 Adjust the audio configuration parameters of the audio system according to the acquired volume data, so that the audio configuration parameters are adapted to the acquired volume.
  • Step S3 Process the audio data according to the adjusted audio configuration parameters, and emit the processed audio data through the speaker box.
  • the present invention also provides an audio system 100, which applies the audio parameter adaptive adjustment method.
  • the audio system 100 includes a speaker cabinet 1 , a processor 2 and an amplifier 3 .
  • the loudspeaker enclosure 1 includes a rear cavity 1 having a variable volume.
  • the speaker box 1 is used to produce sound.
  • the processor 2 is used for receiving an audio input signal and processing the audio input signal to obtain audio data, and adjusting the audio configuration parameters of the audio system according to the acquired volume data, and according to the adjusted audio
  • the configuration parameters process and output the audio data.
  • the processor 2 includes a back cavity state parameter acquisition module 21 , a back cavity state determination module 22 , an audio processing configuration storage unit 23 , an audio parameter configuration control module 24 and an audio processing module 25 .
  • the back cavity state parameter acquisition module 21 is configured to receive the volume data.
  • the back cavity state determination module 22 is configured to compare the received volume data with the pre-stored volume data, and start to update the audio configuration parameter if the two compared volume data are different.
  • the audio processing configuration storage unit 23 is configured to store a plurality of the audio configuration parameters.
  • the audio configuration parameters are in one-to-one correspondence with the volume data.
  • the audio parameter configuration control module 24 is configured to perform pairing search on the audio configuration parameters stored in the audio processing configuration storage unit according to the received volume number, and perform parameter configuration on the paired audio configuration parameters found. .
  • the audio processing module 25 is configured to process the received audio input signal according to the audio configuration parameter to obtain the audio data.
  • the amplifier 3 is configured to receive the audio data output from the processor 2 , perform signal amplification processing on the audio data, and output the audio data to the speaker box 1 .
  • the speaker box 1, the processor 2 and the amplifier 3 are all devices or modules commonly used in the field, and the designer selects specific devices or modules according to actual product requirements, which will not be described in detail here. .
  • the present invention further provides an audio system 200 , and the audio system 200 applies the audio parameter adaptive adjustment method.
  • the audio system 200 installs a sensor in the speaker box 1 on the basis of the audio system 100, that is, the audio system 200 includes the speaker box 1a.
  • the processor 2 and the amplifier 3 use the same device or module.
  • the speaker box 1a includes the rear cavity 10a of variable volume.
  • a sensor 4 is also installed in the rear cavity 10a of the speaker box 1a.
  • the sensor 4 is electrically connected to the rear cavity state parameter acquisition module 21 .
  • the present invention further provides an audio system 300 , and the audio system 300 applies the audio parameter adaptive adjustment method.
  • the audio system 300 adds a microphone to the audio system 100 .
  • the audio system 300 further includes a microphone 5 .
  • the microphone 5 is electrically connected to the rear cavity state parameter acquisition module 21 .
  • the audio system 300 can directly use the existing speaker box 1, and it is not necessary to install the sensor 4 in the back cavity 10 of the speaker box 1 when it is manufactured, and also does not need to wire the sensor 4. out, it is easier to assemble and implement the audio system 3000.
  • the audio parameter adaptive adjustment method and audio system of the present invention include steps: step S1, acquiring volume data of the rear cavity; step S2, adjusting the audio frequency according to the acquired volume data The audio configuration parameter of the system, so that the audio configuration parameter is adapted to the acquired volume; Step S3, the audio data is processed according to the adjusted audio configuration parameter, and the processed audio data is passed through The speaker box emits sound.
  • the method obtains the paired audio configuration parameters by automatically processing the volume data of the rear cavity, so that the acoustic performance of the speaker box is good.

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Abstract

本发明公开一种音频参数自适应调整方法，其应用于具有扬声器箱的音频系统，所述扬声器箱具有可变体积的后腔，该方法包括如下步骤：步骤S1、获取所述后腔的体积数据；步骤S2、根据获取的所述体积数据调整所述音频系统的音频配置参数，以使所述音频配置参数与获取的所述体积适配；步骤S3、根据调整后的所述音频配置参数对音频数据进行处理，并将处理后的所述音频数据通过所述扬声器箱发声。本发明还公开一种应用所述音频参数自适应调整方法的音频系统。与相关技术相比，本发明的音频参数自适应调整方法和音频系统的声学性能好。

Description

音频参数自适应调整方法和音频系统 技术领域
本发明涉及电声转换领域，尤其涉及一种运用于电子音箱产品的一种音频参数自适应调整方法和音频系统。
背景技术
随着移动互联网时代的到来，智能移动设备的数量不断上升。而在众多移动设备之中，手机无疑是最常见、最便携的移动终端设备。目前，手机的功能极其多样，其中之一便是高品质的音乐功能，因此，用于播放声音的扬声器箱被大量应用到现在的智能移动设备之中。
相关技术的扬声器箱包括具有可变体积的后腔，扬声器箱的后腔可以扩展，使得扬声器箱的声学性能灵活多变，适应各种应用场景，使得用户体验好。
然而，相关技术的扬声器箱的后腔可以扩展，在不同的后腔体积下，就需要有不同的音频参数设置，如果仅使用固定的音频参数设置，那么在某些扩展后的后腔体积下，声音的品质会变差，甚至扬声器箱会出现不可逆的损坏。
因此，实有必要提供一种新的方法和系统解决上述技术问题。
 技术问题
本发明的目的是克服上述技术问题，提供一种声学性能好的音频参数自适应调整方法和音频系统。
 技术解决方案
为了实现上述目的，本发明提供一种音频参数自适应调整方法，其应用于具有扬声器箱的音频系统，所述扬声器箱具有可变体积的后腔，该方法包括如下步骤：
步骤S1、获取所述后腔的体积数据；
步骤S2、根据获取的所述体积数据调整所述音频系统的音频配置参数，以使所述音频配置参数与获取的所述体积适配；
步骤S3、根据调整后的所述音频配置参数对音频数据进行处理，并将处理后的所述音频数据通过所述扬声器箱发声。
优选的，所述步骤S1中，所述扬声器箱包括传感器，所述音频系统通过所述传感器获得所述体积数据。
优选的，所述传感器为接触式的传感器或者非接触式的传感器。
优选的，所述传感器为电位器，所述后腔的体积与该电位器的输出数据一一对应。
优选的，所述传感器为红外距离传感器，所述后腔的体积与该红外距离传感器的输出数据一一对应。
优选的，所述音频系统还包括麦克风和与所述麦克风电连接的处理器，
所述步骤S1之前，所述音频参数自适应调整方法还包括如下步骤：
步骤S01、在所述扬声器箱播放音频前，播放固定频率且固定声音幅度的测试音频；
所述步骤S1包括如下步骤：
步骤S11、所述麦克风获取所述扬声器箱播放测试音频的音频信号并转换为测试音频数据；
步骤S12、所述处理器根据该测试音频数据的声学参数计算出所述体积数据。
优选的，所述处理器根据所述麦克风获取的所述测试音频数据的声音幅度计算出所述体积数据。
优选的，所述声学参数为测试音频数据的声压级。
本发明还提供一种音频系统，其应用如上中任意一项所述的音频参数自适应调整方法，该音频系统还包括：
处理器，用于接收音频输入信号并对该音频输入信号进行处理获得音频数据，同时根据获取的所述体积数据调整所述音频系统的所述音频配置参数，根据调整后的所述音频配置参数对所述音频数据进行处理和输出；
放大器，用于接收所述处理器输出的所述音频数据，并对该音频数据进行信号放大处理并输出至所述扬声器箱。
优选的，所述处理器包括：
后腔状态参数获取模块，用于接收所述体积数据；
后腔状态判定模块，用于根据接收所述体积数据与预存的体积数据进行比较，如比较的两个体积数据不相同，则启动更新所述音频配置参数；
音频处理配置存储单元，用于存储多个所述音频配置参数，所述音频配置参数与所述体积数据一一对应；
音频参数配置控制模块，用于根据接收的所述体积数对所述音频处理配置存储单元存储的所述音频配置参数进行配对查找，将查找到的配对的所述音频配置参数进行参数配置；
音频处理模块，用于将接收的所述音频输入信号根据所述音频配置参数进行处理获得所述音频数据。
 有益效果
与现有技术相比，本发明的音频参数自适应调整方法和音频系统，其包括步骤：步骤S1、获取所述后腔的体积数据；步骤S2、根据获取的所述体积数据调整所述音频系统的音频配置参数，以使所述音频配置参数与获取的所述体积适配；步骤S3、根据调整后的所述音频配置参数对音频数据进行处理，并将处理后的所述音频数据通过所述扬声器箱发声。该方法通过将后腔的体积数据自动处理来获得配对的音频配置参数，从而使得扬声器箱发声的声学性能好。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本发明实施例一的音频参数自适应调整方法的流程框图；
图2为本发明实施例一的传感器与后腔初始状态的示意图；
图3为本发明实施例一的传感器与后腔扩展状态的示意图；
图4为本发明实施例二的音频参数自适应调整方法的流程框图；
图5为本发明音频系统的结构示意图；
图6为本发明音频系统的处理器的结构示意图；
图7为本发明音频系统的实施例一的结构示意图；
图8为本发明音频系统的实施例二的结构示意图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
（实施例一）
请参阅图1所示，本发明提供一种音频参数自适应调整方法，所述音频参数自适应调整方法应用于具有扬声器箱的音频系统，所述扬声器箱具有可变体积的后腔。
所述音频参数自适应调整方法包括如下步骤：
步骤S1、获取所述后腔的体积数据。
所述后腔的可变体积可以通过所述后腔的结构变化引起体积变化，从而使得所述扬声器箱的声学性能改变。所述后腔用于改善所述扬声器箱的低频声学性能。当然，不限于此，本发明的所述音频参数自适应调整方法也可以应用于所述扬声器箱的可变体积的前腔也是可以的。
所述扬声器箱包括传感器，所述音频系统通过所述传感器获得所述体积数据。本实施方式中，所述传感器安装于所述后腔内将所述后腔的体积感应并传输出来。当然，不限于此，所述传感器安装于所述后腔外部也可以，例如设置所述后腔外壁或者所述扬声器箱的壳体内均可以，并且不接触后腔部件，所述传感器可以监测到所述后腔的可动部件的移动。其中，所述后腔的体积变化通过所述可动部件的移动实现。
具体的，所述传感器为接触式的传感器或者非接触式的传感器。
所述传感器为电位器，所述后腔的体积与该电位器的输出数据一一对应。当然，其他感应体积变化或者感应长度距离变化传感器也是可以的，本实施方式中，所述传感器为红外距离传感器，所述后腔的体积与该红外距离传感器的输出数据一一对应。采用红外距离传感器在不影响到所述后腔因改变体积而结构变形困难，易于安装和设计所述后腔，还可以精准进行距离测量而不受到因体积变化产生的空气压力等因素影响。采用所述红外距离传感器可以直接监测到所述后腔的所述可动部件的移动或者监测所述可动部件与外部某个部件之间的距离。
本实施方式中，采用所述红外距离传感器可以直接监测到所述后腔的所述可动部件的移动实现，具体过程如下：
请参阅图2所示，图2为本发明实施例一的传感器与后腔初始状态的示意图。具体的，扬声器箱a1内设有后腔a10。红外距离传感器a11固定于后腔a10内，并与可动部件a101正对设置。在后腔a10的初始状态时，红外距离传感器a11测量出其与可动部件a101的距离为d1。其中d1与后腔a10的初始状态的体积一一对应。
请参阅图3所示，图3为本发明实施例一的传感器与后腔扩展状态的示意图。后腔a10的扩展状态时，可动部件a101向远离红外距离传感器a11的方向移动以实现后腔a10的体积扩大。这时，红外距离传感器a11测量出其与可动部件a101的距离为d2。其中d2与后腔a10的扩展状态的体积一一对应。
步骤S2、根据获取的所述体积数据调整所述音频系统的音频配置参数，以使所述音频配置参数与获取的所述体积适配。
所述后腔的所述体积的大小与所述音频配置参数一一匹配，预先将所述体积与所述音频配置参数的对应关系设置好，并通过查找表方式实现，可以在降低所述音频系统的处理计算时间和计算硬件配置。当然，直接采用预设的计算公式也是可以实现的。所述步骤S2使得所述音频系统识别出后腔状态后，所述音频系统自动切换至适配的音频参数设置，从而避免了通过用户手动设置。若由用户手动设置，容易产生参数不匹配的错误，这样的情况将导致声音品质下降，甚至造成所述扬声器箱损坏，同时用户体验也不好。
步骤S3、根据调整后的所述音频配置参数对音频数据进行处理，并将处理后的所述音频数据通过所述扬声器箱发声。
调整所述音频系统的所述音频配置参数并采用所述音频配置参数将音频输入信号进行处理，用于所述扬声器箱准确将声音播放出来。
（实施例二）
请参阅图4所示，图4为本发明实施例二的音频参数自适应调整方法的流程框图。本实施例二的音频参数自适应调整方法与实施例一的音频参数自适应调整方法区别在于所述步骤S1中的获取所述后腔的体积数据为采用麦克风方式。
在本实施例二的实施方式中，所述音频系统还包括麦克风和与所述麦克风电连接的处理器。例如所述音频系统为手机，手机安装有麦克风。
所述音频参数自适应调整方法包括如下步骤：
步骤S01、在所述扬声器箱播放音频前，播放固定频率且固定声音幅度的测试音频。
步骤S1、获取所述后腔的体积数据。其中，所述步骤S1包括如下步骤：
步骤S11、所述麦克风获取所述扬声器箱播放测试音频的音频信号并转换为测试音频数据。
步骤S12、所述处理器根据该测试音频数据的声学参数计算出所述体积数据。
利用所述麦克风获取所述音频信号，可以使得所述音频系统可以直接采用现有所述扬声器箱，不需要在所述扬声器箱制作时在其的所述后腔内安装所述传感器，同样不需要将所述传感器引线出来，更易于所述音频系统的组装和实现。
在所述实施例二中，所述处理器根据所述麦克风获取的所述测试音频数据的声音幅度计算出所述体积数据。
其中，音频输入确定的信号幅度时，并在所述音频配置参数设置不变时，不同的所述扬声器箱的所述后腔的体积将带来不同的声音幅度输出。
具体的，所述声学参数为测试音频数据的声压级(英文：Sound Pressure Level，简称SPL)，声音测量最常用的物理量是声压,但描述声压的大小通常用声压级，当然，不限于声压级，其他测量的声学参数也是可以的。
具体来说，所述扬声器箱在不同体积的所述后腔的情况时，在某同一频率下的声压级是不一样的，所述后腔的所述体积更大时，在同等电压下，低频(例如200Hz处)的声压级SPL会更高。当所述扬声器箱的所述后腔的体积大小在一定范围内时，所述扬声器箱的低频响度(即声压级SPL)与所述后腔的体积呈正相关。尤其对于微型扬声器箱而言，其后腔体积很小，低频响度与后腔体积的正相关关系十分明显。
因此，本实施例二中在每次播放音乐前，通过所述音频系统设定预先发一个频率的信号，再通过所述音频系统自带所述麦克风接收声音，根据声音的幅度进行判定。本实施例二的麦克风方案可以避免额外传感器的使用，节省所述音频系统和所述扬声器箱的空间与成本。
步骤S2、根据获取的所述体积数据调整所述音频系统的音频配置参数，以使所述音频配置参数与获取的所述体积适配。
步骤S3、根据调整后的所述音频配置参数对音频数据进行处理，并将处理后的所述音频数据通过所述扬声器箱发声。
请同时参阅图5-6所示，本发明还提供一种音频系统100，其应用所述音频参数自适应调整方法。
所述音频系统100包括扬声器箱1、处理器2以及放大器3。
所述扬声器箱1包括具有可变体积的后腔1。所述扬声器箱1用于发声。
所述处理器2用于接收音频输入信号并对该音频输入信号进行处理获得音频数据，同时根据获取的所述体积数据调整所述音频系统的所述音频配置参数，根据调整后的所述音频配置参数对所述音频数据进行处理和输出。
所述处理器2包括后腔状态参数获取模块21、后腔状态判定模块22、音频处理配置存储单元23、音频参数配置控制模块24以及音频处理模块25。
所述后腔状态参数获取模块21用于接收所述体积数据。
所述后腔状态判定模块22，用于根据接收所述体积数据与预存的体积数据进行比较，如比较的两个体积数据不相同，则启动更新所述音频配置参数。
所述音频处理配置存储单元23用于存储多个所述音频配置参数。所述音频配置参数与所述体积数据一一对应。
所述音频参数配置控制模块24用于根据接收的所述体积数对所述音频处理配置存储单元存储的所述音频配置参数进行配对查找，将查找到的配对的所述音频配置参数进行参数配置。
所述音频处理模块25用于将接收的所述音频输入信号根据所述音频配置参数进行处理获得所述音频数据。
所述放大器3用于接收所述处理器2输出的所述音频数据，并对该音频数据进行信号放大处理并输出至所述扬声器箱1。
需要指出的是，所述扬声器箱1、所述处理器2以及所述放大器3均为本领域常用的器件或者模块，设计者根据实际产品需求进行选择具体的器件或者模块，在此不作详细描述。
请参阅图7所示，对应本实施例一采用的传感器方案，本发明还提供一种音频系统200，音频系统200应用所述音频参数自适应调整方法。
所述音频系统200在所述音频系统100的基础上在所述扬声器箱1内安装传感器，即所述音频系统200包括所述扬声器箱1a。而所述处理器2和所述放大器3采用相同的器件或者模块。
具体的，所述扬声器箱1a包括可变体积的所述后腔10a。所述扬声器箱1a的所述后腔10a内还安装有传感器4。所述传感器4与所述后腔状态参数获取模块21电连接。
请参阅图8所示，对应本实施例二采用的麦克风方案，本发明还提供一种音频系统300，音频系统300应用所述音频参数自适应调整方法。
所述音频系统300在所述音频系统100的基础上增加麦克风。具体的，所述音频系统300还包括麦克风5。所述麦克风5与所述后腔状态参数获取模块21电连接。所述音频系统300可以直接采用现有所述扬声器箱1，不需要在所述扬声器箱1制作时在其的所述后腔10内安装所述传感器4，同样不需要将所述传感器4引线出来，更易于所述音频系统3000的组装和实现。
与现有技术相比，本发明的音频参数自适应调整方法和音频系统，其包括步骤：步骤S1、获取所述后腔的体积数据；步骤S2、根据获取的所述体积数据调整所述音频系统的音频配置参数，以使所述音频配置参数与获取的所述体积适配；步骤S3、根据调整后的所述音频配置参数对音频数据进行处理，并将处理后的所述音频数据通过所述扬声器箱发声。该方法通过将后腔的体积数据自动处理来获得配对的音频配置参数，从而使得扬声器箱发声的声学性能好。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种音频参数自适应调整方法，其应用于具有扬声器箱的音频系统，所述扬声器箱具有可变体积的后腔，其特征在于，该方法包括如下步骤：
    步骤S1、获取所述后腔的体积数据；
    步骤S2、根据获取的所述体积数据调整所述音频系统的音频配置参数，以使所述音频配置参数与获取的所述体积适配；
    步骤S3、根据调整后的所述音频配置参数对音频数据进行处理，并将处理后的所述音频数据通过所述扬声器箱发声。
  2. 根据权利要求1所述的音频参数自适应调整方法，其特征在于，所述步骤S1中，所述扬声器箱包括传感器，所述音频系统通过所述传感器获得所述体积数据。
  3. 根据权利要求2所述的音频参数自适应调整方法，其特征在于，所述传感器为接触式的传感器或者非接触式的传感器。
  4. 根据权利要求3所述的音频参数自适应调整方法，其特征在于，所述传感器为电位器，所述后腔的体积与该电位器的输出数据一一对应。
  5. 根据权利要求3所述的音频参数自适应调整方法，其特征在于，所述传感器为红外距离传感器，所述后腔的体积与该红外距离传感器的输出数据一一对应。
  6. 根据权利要求1所述的音频参数自适应调整方法，其特征在于，所述音频系统还包括麦克风和与所述麦克风电连接的处理器，
    所述步骤S1之前，所述音频参数自适应调整方法还包括如下步骤：
    步骤S01、在所述扬声器箱播放音频前，播放固定频率且固定声音幅度的测试音频；
    所述步骤S1包括如下步骤：
    步骤S11、所述麦克风获取所述扬声器箱播放测试音频的音频信号并转换为测试音频数据；
    步骤S12、所述处理器根据该测试音频数据的声学参数计算出所述体积数据。
  7. 根据权利要求6所述的音频参数自适应调整方法，其特征在于，所述处理器根据所述麦克风获取的所述测试音频数据的声音幅度计算出所述体积数据。
  8. 根据权利要求7所述的音频参数自适应调整方法，其特征在于，所述声学参数为测试音频数据的声压级。
  9. 一种音频系统，其特征在于，其应用如权利要求1-8中任意一项所述的音频参数自适应调整方法，该音频系统还包括：
    处理器，用于接收音频输入信号并对该音频输入信号进行处理获得音频数据，同时根据获取的所述体积数据调整所述音频系统的所述音频配置参数，根据调整后的所述音频配置参数对所述音频数据进行处理和输出；
    放大器，用于接收所述处理器输出的所述音频数据，并对该音频数据进行信号放大处理并输出至所述扬声器箱。
  10. 根据权利要求9所述的音频系统，其特征在于，所述处理器包括：
    后腔状态参数获取模块，用于接收所述体积数据；
    后腔状态判定模块，用于根据接收所述体积数据与预存的体积数据进行比较，如比较的两个体积数据不相同，则启动更新所述音频配置参数；
    音频处理配置存储单元，用于存储多个所述音频配置参数，所述音频配置参数与所述体积数据一一对应；
    音频参数配置控制模块，用于根据接收的所述体积数对所述音频处理配置存储单元存储的所述音频配置参数进行配对查找，将查找到的配对的所述音频配置参数进行参数配置；
    音频处理模块，用于将接收的所述音频输入信号根据所述音频配置参数进行处理获得所述音频数据。
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