WO2023005654A1 - 一种播放设备、发声设备及其控制装置 - Google Patents

一种播放设备、发声设备及其控制装置 Download PDF

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Publication number
WO2023005654A1
WO2023005654A1 PCT/CN2022/105082 CN2022105082W WO2023005654A1 WO 2023005654 A1 WO2023005654 A1 WO 2023005654A1 CN 2022105082 W CN2022105082 W CN 2022105082W WO 2023005654 A1 WO2023005654 A1 WO 2023005654A1
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Prior art keywords
speaker
signal
sound
control
module
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Ceased
Application number
PCT/CN2022/105082
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English (en)
French (fr)
Inventor
肖斌峰
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Goertek Techology Co Ltd
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Goertek Techology Co Ltd
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Priority to US18/291,604 priority Critical patent/US20240284099A1/en
Publication of WO2023005654A1 publication Critical patent/WO2023005654A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
    • H04R1/347—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers for obtaining a phase-shift between the front and back acoustic wave
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/12—Circuits for transducers for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/03—Synergistic effects of band splitting and sub-band processing

Definitions

  • the present application relates to the field of audio control, in particular to a playback device, a sound generating device and a control device thereof.
  • the sound-generating device includes a speaker.
  • the front of the speaker is connected to the front sound outlet of the sound-generating device, and the back of the speaker It is connected with the rear sound outlet of the sound-generating device, and the sound-generating device radiates sound signals outward through the front sound outlet and the rear sound outlet. Since the sound signal on the front of the loudspeaker is in opposite phase to the sound signal on the back, the sound signals at the front and rear sound outlets of the sound-generating device are in opposite phase.
  • the distance between the receiving point in the horizontal direction and the front and rear sound outlets is the same, which causes the acoustic signal received by the receiving point to attenuate a lot compared with other directions, so as to achieve the purpose of attenuating the sound radiation to the outside world.
  • the signal heard by the human ear will also be affected by the signal interference between the front sound outlet and the rear sound outlet, which makes the sensitivity of the human ear to the middle and low frequency sound signals decrease.
  • the purpose of this application is to provide a playback device, sound generation device and its control device, which can not only achieve the purpose of attenuating the sound radiation to the outside world, but also reduce the attenuation of the far-field sound signal, so that when the external environment is noisy, The purpose of improving the sensitivity of the acoustic signal at the human ear.
  • the present application provides a sound-generating device, which includes a casing, the casing is provided with a front sound outlet and a rear sound outlet, and the interior of the casing is provided with a first speaker and a second speaker , the front cavity of the first speaker communicates with the front sound outlet, the rear cavity of the first speaker and the front cavity of the second speaker communicate with the rear sound outlet, and the second speaker The posterior cavity is closed;
  • the acoustic signal output by the rear cavity of the first speaker is opposite to the acoustic signal output by the front cavity of the second speaker, and the acoustic signal output by the rear cavity of the first speaker is opposite to the acoustic signal output by the front cavity of the first speaker.
  • the acoustic signals output by the cavity are in opposite phase.
  • the present application also provides a control device for a sounding device, the sounding device is the sounding device described in any one of the above, and the control device includes:
  • a trigger module configured to generate a trigger signal when activated
  • the control module is used to control the output audio signal, and is also used to generate a first control signal when the trigger signal is received, and generate a second control signal when the trigger signal is not received;
  • An adjustment module configured to control the first speaker and the second speaker in the sound generating device to output an acoustic signal based on the audio signal when the first control signal is received, and control the The first speaker outputs an acoustic signal based on the audio signal, and controls the second speaker not to work.
  • the number of the second speaker is one, and when the first control signal is received, the adjustment module controls the first speaker and the second speaker in the sound-generating device to output audio signals based on the audio signal. acoustic signal.
  • the adjustment module controls the first speaker and one or more second speakers in the sound generating device to output an output based on an acoustic signal of the audio signal.
  • the trigger module is one or more of a pressure sensor, a switch or a noise sensor.
  • the adjustment module includes:
  • a filter compensation module configured to adjust the gain value and phase value of each frequency segment of the audio signal
  • a first power amplification module connected to the first speaker, configured to adjust the gain value of each frequency segment of the audio signal according to the received first control signal or the second control signal, so that the first A loudspeaker outputs the first sound signal or the second sound signal;
  • a second power amplifying module connected to the second speaker is configured to adjust the gain value of each frequency segment of the audio signal, so that the second speaker outputs a third sound signal.
  • the adjustment module also includes:
  • a first switch disposed between the first power amplifying module and the power supply module and configured to be closed when receiving the first control signal or the second control signal;
  • a second switch disposed between the second power amplifying module and the power supply module for closing when receiving the first control signal and opening when not receiving the first control signal.
  • the filter compensation module is a DSP.
  • the present application also provides a playback device, including:
  • a control device for a sound emitting device as described in any one of the above.
  • the present application provides a sounding device, including two speakers, wherein the rear cavity of the first speaker is connected to the front cavity of the second speaker, coupled at the rear sound outlet of the sounding device, when only the first speaker is working,
  • the amplitude of the sound signal output by the front sound outlet and the rear sound outlet of the sound generating device is similar, and the phase is opposite.
  • the far field has an obvious attenuation effect, which achieves the purpose of attenuating the sound radiation to the outside; when the first speaker When working with the second loudspeaker, since the sound signal output by the second loudspeaker is opposite in phase to the sound signal output by the rear cavity of the first loudspeaker, and the amplitude is similar, the sound signal output by the rear sound outlet of the sound-generating device is attenuated, thereby The impact on the intensity of the sound signal radiated from the front sound outlet is reduced, the attenuation of the far-field sound signal is significantly weakened, and the sensitivity of the sound signal at the human ear is improved when the external environment noise is large.
  • the present application also provides a control device for a sound generating device and a playback device, which have the same beneficial effect as the above sound generating device.
  • Fig. 1 is a schematic structural diagram of a sounding device in the prior art
  • FIG. 2 is a schematic structural diagram of a sounding device provided by the present application.
  • FIG. 3 is a schematic structural diagram of another sounding device provided by the present application.
  • FIG. 4 is a schematic structural diagram of a control device for a sounding device provided by the present application.
  • FIG. 5 is a schematic structural diagram of another control device for sounding equipment provided by the present application.
  • FIG. 6 is a schematic structural diagram of another control device for sounding equipment provided by the present application.
  • FIG. 7 is a schematic structural diagram of a playback device provided by the present application.
  • the core of this application is to provide a playback device, a sound generating device and its control device, which can not only achieve the purpose of attenuating the sound radiation to the outside world, but also reduce the attenuation of the far-field sound signal, so that when the external environment is noisy, The purpose of improving the sensitivity of the acoustic signal at the human ear.
  • Fig. 2 and Fig. 3 are structural schematic diagrams of a sound emitting device provided by the present application.
  • port 012 the inside of the housing 01 is provided with a first speaker 02 and a second speaker 03, the front cavity of the first speaker 02 communicates with the front sound outlet 011, the rear cavity of the first speaker 02 and the front cavity of the second speaker 03 Both communicate with the rear sound outlet 012, and the rear cavity of the second speaker 03 is closed;
  • the acoustic signal output by the rear chamber of the first speaker 02 is opposite to the acoustic signal output by the front chamber of the second speaker 03, and the acoustic signal output by the rear chamber of the first speaker 02 is opposite to the acoustic signal output by the front chamber of the first speaker 02.
  • the signal phase is reversed.
  • the housing 01 of the sound generating device is provided with a front sound outlet 011 and a rear sound outlet 012 , which are arranged opposite to each other.
  • the front sound outlet 011 is the sound outlet of the sound generating device near the human ear.
  • the sound generating device radiates sound signals outward through the front sound outlet 011 and the rear sound outlet 012 . It can be understood that the acoustic signal radiated from the front sound outlet 011 and the sound signal radiated from the rear sound outlet 012 will be superimposed in the air and then arrive at the receiving point.
  • the sound generating device includes a first speaker 02 and a second speaker 03 , both of which are arranged in a housing 01 of the sound generating device.
  • the first loudspeaker 02, the second loudspeaker 03 and the housing 01 in the sounding device of the present application can adopt the following structure, that is, the first The front cavity of the speaker 02 communicates with the front sound outlet 011 of the housing 01, the rear cavity of the first speaker 02 communicates with the front cavity of the second speaker 03, and is coupled at the rear sound outlet 012 of the housing 01, and the second speaker The rear cavity of 03 is closed.
  • the sound generating device only outputs the sound signal from the first loudspeaker 02, because the sound signal output by the front chamber of the first loudspeaker 02 and the first loudspeaker 02
  • the amplitude of the acoustic signal output by the rear cavity of the speaker 02 is similar, but the phase is opposite. Therefore, the acoustic signal radiated from the front sound outlet 011 of the housing 01 and the sound signal radiated from the rear sound outlet 012 of the housing 01 are also The amplitude is similar and the phase is opposite.
  • the far field has obvious signal attenuation effect, so as to achieve the purpose of attenuating the sound radiation to the outside world.
  • the sound-generating device simultaneously output acoustic signals from the first loudspeaker 02 and the second loudspeaker 03, since the back chamber of the first loudspeaker 02 communicated with the front chamber of the second loudspeaker 03, And it is coupled at the rear sound outlet 012 of the housing 01, and since the sound signal output from the rear chamber of the first speaker 02 is in opposite phase to the sound signal output from the front chamber of the second speaker 03, the rear sound outlet of the housing 01
  • the acoustic signal at 012 is attenuated.
  • the amplitude of the acoustic signal at the rear sound outlet 012 of the housing 01 is no longer similar to the acoustic signal at the front sound outlet 011, thereby reducing the impact on the front sound outlet 011.
  • the influence of the sound signal of the human ear significantly weakens the attenuation of the far-field sound signal, and at the same time, the sound loudness at the human ear in the near field will increase, thereby improving the sensitivity of the sound signal at the human ear and controlling the directivity of the far-field sound signal.
  • one or more second speakers 03 can be provided, so that the front cavity of the second speaker 03 is communicated with the rear cavity of the first speaker 02 and can be coupled at the rear sound outlet 012 of the casing 01.
  • the present application does not specifically limit the quantity of the second speakers 03 and their arrangement and relative positions in the casing 01 .
  • the sound generating device includes two speakers, wherein the rear cavity of the first speaker 02 is connected to the front cavity of the second speaker 03, and is coupled at the rear sound outlet 012 of the sound generating device.
  • the amplitude of the sound signal output by the front sound outlet 011 and the rear sound outlet 012 of the sound generating device is similar, and the phase is opposite.
  • the far field has an obvious attenuation effect, which can attenuate the sound radiation to the outside world.
  • Fig. 4 is a structural schematic diagram of a control device for a sounding device provided by the present application.
  • the sounding device is a sounding device as described in any of the above embodiments.
  • the sound outlet and the rear sound outlet, the inside of the housing is provided with a first speaker 02 and a second speaker 03, the front chamber of the first speaker 02 communicates with the front sound outlet, the rear chamber of the first speaker 02 and the second speaker
  • the front cavity of 03 is connected with the rear sound outlet, and the rear cavity of the second speaker 03 is closed;
  • the controls include:
  • a trigger module 11 configured to generate a trigger signal when activated
  • the control module 12 is used to control the output audio signal, and is also used to generate a first control signal when the trigger signal is received, and generate a second control signal when the trigger signal is not received;
  • the adjustment module 13 is configured to control the first speaker 02 and the second speaker 03 in the sound generating device to output an acoustic signal based on the audio signal when receiving the first control signal, and control the first speaker 02 to output an acoustic signal based on the audio signal when receiving the second control signal. Based on the acoustic signal of the audio signal, the second speaker 03 is controlled not to work.
  • the control device provided in this embodiment includes a trigger module 11 , a control module 12 and an adjustment module 13 , wherein the trigger module 11 can be manually activated by a user, or can be automatically activated according to preset conditions.
  • the trigger module 11 can be manually activated by a user, or can be automatically activated according to preset conditions.
  • the control module 12 can select the speaker that needs to work in the sound generating device according to whether the trigger signal is received, for example, the first speaker 02 works alone, or the first speaker 02 and the second speaker 03 work together.
  • mode 1 the mode that requires the first speaker 02 and the second speaker 03 to work together
  • mode 2 the mode that requires the first speaker 02 to work alone
  • mode one is that the first speaker 02 and one second speaker 03 work together. Work.
  • control module 12 is used to control the output audio signal, and generate a corresponding control signal according to whether a trigger signal is received. If a trigger signal is received, a first control signal is generated; if a trigger signal is not received, a second control signal is generated. control signal.
  • the control module 12 can be realized by MCU (Microcontroller Unit, micro control unit) or SOC (System on Chip, system on chip), and of course other devices that can realize the same function can also be selected, and this embodiment does not make specific limitations here.
  • the control module 12 controls the phase and gain of the output audio signal to adjust accordingly, and controls the first speaker 02 and the second speaker 03 to output sound based on the audio signal respectively.
  • the control module 12 controls the phase and gain of the output audio signal to adjust accordingly, and controls the first speaker 02 and the second speaker 03 to output sound based on the audio signal respectively.
  • the number of the second speaker 03 is one
  • the first speaker 02 and the second speaker 03 work simultaneously
  • control the first speaker 02 and one or more Two second loudspeakers 03 work together, because the sound signal output by the front chamber of the second loudspeaker 03 is opposite in phase to the sound signal output by the rear chamber of the first loudspeaker 02, and the amplitude is similar, so the sound output by the rear sound outlet of the sound generating device The signal is attenuated.
  • the intensity of the acoustic signal radiated by the sound outlet has a greater influence, so that the acoustic signal of the rear sound outlet has different effects on the weakening of the intensity of the acoustic signal radiated by the front sound outlet according to the different external environments, so that the far-field level
  • the directional noise reduction effect is weakened, and the loudness of the sound received by the human ear in the near field is increased, so as to achieve the purpose of improving the signal sensitivity of the human ear.
  • the control module 12 controls the phase and gain of the output audio signal to adjust accordingly, controls the first speaker 02 to output an acoustic signal based on the audio signal, and controls the second speaker 02 03 doesn't work.
  • the sound signals radiated from the front sound outlet and the rear sound outlet of the housing of the sounding device are respectively the sound signals and the sound signals output by the front chamber of the first loudspeaker 02.
  • the acoustic signal output by the rear cavity of the first loudspeaker 02 at this time, the maximum output of the acoustic signal is relatively small due to the acoustic short circuit phenomenon of the front and rear sound outlets of the sound emitting device, and has a noise reduction effect in the far field horizontal direction, Privacy is better.
  • the trigger module 11 is one or more of a pressure sensor, a switch or a noise sensor.
  • a pressure sensor is used as the trigger module 11 in this embodiment, it can be determined whether the trigger module 11 is activated according to the pressing force of the user, that is, the pressure value collected by the pressure sensor. When the pressure value is greater than or equal to the preset pressure value, trigger The module 11 is activated to generate a trigger signal. When an audio signal needs to be output, the control module 12 controls the sound-generating device to work in mode 1. When the number of the second speaker 03 is one, the first speaker 02 and the second speaker 03 are controlled to work.
  • the control module 12 controls the sound-generating device to work in mode 2.
  • a toggle switch is used as the trigger module 11 in this embodiment, it can be determined whether the trigger module 11 is activated according to the position signal of the toggle switch.
  • the position signal of the toggle switch corresponds to the first position
  • the trigger module 11 is activated to generate a trigger signal
  • the control module 12 controls the sound-generating device to work in mode one
  • the number of the second speaker 03 is one, it controls the work of the first speaker 02 and the second speaker 03, and when the number of the second speaker 03 is
  • multiple, different trigger signals are set according to different positions of the switch, and the first speaker 02 and the corresponding number of second speakers 03 are controlled to work according to different trigger signals;
  • the position signal of the switch corresponds to the second position
  • the trigger module 11 does not is activated, no trigger signal is generated, and when an audio signal needs to be output, the control module 12 controls the sound-generating device to work in mode 2.
  • a noise sensor is used as the trigger module 11 in this embodiment, it can be determined whether the trigger module 11 is activated according to the noise value of the environment where the sound-emitting device is located.
  • the trigger module 11 is activated and generates Trigger signal, when the audio signal needs to be output, the control module 12 controls the sound-generating device to work in mode one, when the number of the second speaker 03 is one, controls the first speaker 02 and the second speaker 03 to work, when the second speaker 03
  • the number is multiple, different noise levels are set according to the noise value, and the first loudspeaker 02 and the corresponding number of second loudspeakers 03 are controlled according to different noise levels.
  • the trigger module 11 when the number of second loudspeakers 03 is 3, the noise When the value is greater than 60 decibels, the trigger module 11 is activated to generate a trigger signal. When the noise value is 60-70 decibels, the first trigger signal is generated. At this time, the first speaker 02 and a second speaker 03 are controlled to work. When the noise value When 70-80 decibels, generate the second trigger signal, control the first loudspeaker 02 and two second loudspeakers 03 to work at this moment, when the noise value is greater than 80 decibels, generate the 3rd trigger signal, control the first loudspeaker 02 at this moment Work with three second speakers 03; when the noise value is less than the preset noise value, the trigger module 11 is not activated and does not generate a trigger signal. When an audio signal needs to be output, the control module 12 controls the sound-generating device to work in mode 2. As an optional embodiment, the existing microphone in the playback device can be used to collect noise, thereby reducing hardware costs.
  • the trigger module 11 and the control module 12 can be realized by selecting the above-mentioned devices, and can also be realized by other devices, as long as they can realize the same function, and this embodiment does not make specific limitations here.
  • the adjustment module 13 includes:
  • a filter compensation module 131 configured to adjust the gain value and phase value of each frequency segment of the audio signal
  • the first power amplification module 132 connected to the first speaker 02 is used to adjust the gain value of each segment frequency of the audio signal according to the received first control signal or second control signal, so that the first speaker 02 outputs the first sound signal or a second tone;
  • the second power amplifying module 133 connected to the second speaker 03 is configured to adjust the gain value of each frequency segment of the audio signal, so that the second speaker 03 outputs a third sound signal.
  • the number of the second power amplifying module 133 is the same as the number of the second loudspeaker 03.
  • the adjustment module 13 includes a second power amplifying module 133.
  • the adjustment module 13 includes a plurality of second power amplifying modules 133, and each power amplifying module 133 is connected to a plurality of second speakers 03 in a one-to-one correspondence.
  • the filter compensation module 131 and the power amplification module respectively correspond to different configuration parameters. Under different configuration parameters, the first loudspeaker 02 and the second loudspeaker 03 can output different sound output based on the audio signal. Signal.
  • the filter configuration parameter and PA gain configuration parameter of mode one When it is necessary to control the sound-emitting device to work in mode one, select the filter configuration parameter and PA gain configuration parameter of mode one to configure the filter compensation module 131, the first power amplification module 132 and each second power amplification module 133; when it is necessary to control the sound-emitting device When working in mode 2, select the filter configuration parameters and PA gain configuration parameters of mode 2 to configure the filter compensation module 131 and the first power amplification module 132, wherein the filter configuration parameters include the gain value and phase value of each frequency segment.
  • the first power amplifying module 132 has two sets of PA gain configuration parameters, one for mode 1 and the other for mode 2
  • each second power amplifying module 133 has a set of PA gain configuration parameters, Applies to mode one.
  • the control process of the present application will be described below only by taking the example that the sound generating device includes a second speaker 03 and the adjustment module 13 includes a second power amplification module 133 .
  • the sound generating device includes a plurality of second speakers 03 and the adjustment module 13 includes a plurality of second power amplification modules 133
  • the control process for each second speaker 03 is the same as reason.
  • the sound-emitting device is controlled to work in mode two.
  • the filter compensation module 131 adjusts the audio signal output by the control module 12 through the filter configuration parameters of mode 2, correspondingly, the first The power amplification module 132 continues to adjust the audio signal adjusted by the filter compensation module 131 through the PA gain configuration parameter of mode 2, and then outputs it through the first speaker 02 .
  • the sound signals output by the front and rear sound outlets of the sounding device are respectively the sound signals output by the front chamber of the first loudspeaker 02 and the rear chamber of the first loudspeaker 02.
  • the amplitude of the acoustic signal output by the front cavity of the first speaker 02 and the rear cavity of the first speaker 02 are similar, but the phase is opposite. Therefore, in mode 2, the maximum output of the acoustic signal is relatively small due to the acoustic short circuit of the front and rear sound outlets, but It has a noise reduction effect in the horizontal direction of the far field, so it has better privacy.
  • the sound-emitting device is controlled to work in mode one.
  • the control logic shown in FIG. Control the first power amplifying module 132 to select the PA gain configuration parameter of mode 1, and at the same time control the second power amplifying module 133 to start working.
  • the acoustic signal output by the rear sound outlet of the first loudspeaker 02 is attenuated, reducing the intensity of the acoustic signal of the rear sound outlet to the acoustic signal radiated by the front sound outlet
  • the noise reduction effect in the far-field horizontal direction will be weakened, and the loudness of the sound received by the human ear in the near-field will increase, so as to achieve the purpose of improving the signal sensitivity of the human ear when the external noise is large.
  • the first power amplification module can be set to work in Mode 1.
  • the PA gain parameter is smaller than the PA gain parameter in mode 2.
  • the PA gain value in mode 1 may be 7dB smaller than the PA gain value in mode 2.
  • Mode 1 is suitable for use in noisy environments that do not require privacy and require a higher output signal size.
  • this application can change the working mode of the sound emitting device under different requirements, control the sound radiation to the outside world, and control the upper limit of the sound signal output, with very little impact on the bandwidth.
  • each second power amplifying module 133 may select the same PA gain configuration parameter or may select different PA gain configuration parameters.
  • the corresponding number of second speakers 03 can be directly selected to work according to the user's needs, so that the output of one or more second speakers 03 meets the user's needs For example, the greater the noise value, the greater the number of second loudspeakers 03 can be selected to work at the same time.
  • the second power amplifying module 133 with the corresponding PA gain configuration parameters can be selected to work according to user needs, for example, according to the current noise value to determine the required The magnitude of the acoustic signal output by the second speaker 03, so that the second power amplification module 133 that selects the corresponding PA gain configuration parameter works, so that one or more second speakers 03 output an acoustic signal that meets the user's demand.
  • the adjustment module 13 also includes:
  • a first switch disposed between the first power amplifying module 132 and the power supply module and used for closing when receiving the first control signal or the second control signal;
  • the second switch is arranged between the second power amplifying module 133 and the power supply module, and is used for closing when receiving the first control signal and opening when not receiving the first control signal.
  • a first switch is also provided between the power supply module and the power supply terminal of the first power amplifying module 132, and correspondingly, a second switch is provided between the power supply module and the power supply terminal of each second power amplifying module 133.
  • the control module 12 can control whether the first power amplifying module 132 and the second power amplifying module 133 need to work by controlling the on or off of the first switch and the second switch. It can be understood that when the second power When the amplifying module 133 is not working, no signal is transmitted to the second speaker 03, and the second speaker 03 is not working at this time.
  • the state of the power amplifier module is controlled by cutting off or turning on the power supply path, which improves control accuracy and reliability.
  • the filter compensation module 131 is a DSP.
  • the filter compensation module 131 can be implemented by DSP or by an analog circuit, as long as it can achieve the purpose of adjusting the magnitude and phase of each frequency gain, which is not specifically limited in this application.
  • FIG. 7 is a schematic structural diagram of a playback device provided by the present application.
  • the playback device includes:
  • the sounding device 21 as described in any one of the above embodiments;
  • control device 22 of the sounding device 21 as described in any one of the above embodiments.
  • this application can be applied to all head-mounted playback devices or ear-mounted playback devices, such as smart glasses, AR/Bluetooth headsets, and all sound playback devices used in in-ear scenarios.
  • a playback device provided by the present application has the same beneficial effects as the above-mentioned sound generating device 21 and the control device 22 .

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Abstract

本申请公开了一种发声设备，包括壳体，壳体设有前出声口和后出声口，壳体的内部设有第一扬声器和第二扬声器，第一扬声器的前腔与前出声口连通，第一扬声器的后腔及第二扬声器的前腔均与后出声口连通，第二扬声器的后腔封闭；其中，第一扬声器的后腔输出的声信号与第二扬声器的前腔输出的声信号相位相反，第一扬声器的后腔输出的声信号与第一扬声器的前腔输出的声信号相位相反。本申请既能够达到衰减向外界的声辐射的目的，也能够达到减弱对远场声信号的衰减，使人耳处声信号灵敏度提高的目的。本申请还公开了一种发声设备的控制装置及播放设备，具有以上有益效果。

Description

一种播放设备、发声设备及其控制装置
本申请要求于2021年07月27日提交中国专利局、申请号202110849261.0、发明名称为“一种播放设备、发声设备及其控制装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及音频控制领域，特别涉及一种播放设备、发声设备及其控制装置。
背景技术
目前，常用的头戴播放设备都是通过其上设置的发声设备来播放声信号，发声设备中包括扬声器，参照图1所示，扬声器的正面与发声设备的前出声口相连，扬声器的背面与发声设备的后出声口相连，发声设备通过前出声口和后出声口向外辐射声信号。由于扬声器正面的声信号和其背面的声信号相位相反，因此发声设备的前出声口和后出声口的声信号相位相反。在水平方向的接收点距离前、后出声口的距离相同，导致接收点接收到的声信号相对其他方向衰减很多，以此达到衰减向外界的声辐射的目的。但是在近场处，即人耳处听到的信号也会受前出声口与后出声口的信号干涉的影响，使得人耳处对中、低频声信号灵敏度下降。
因此，如何提供一种解决上述技术问题的方案是本领域技术人员目前需要解决的问题。
发明内容
本申请的目的是提供一种播放设备、发声设备及其控制装置，既能够达到衰减向外界的声辐射的目的，也能够达到减弱对远场声信号的衰减，使得外界环境噪声较大时，提高人耳处声信号灵敏度的目的。
为解决上述技术问题，本申请提供了一种发声设备，包括壳体，所述壳体设有前出声口和后出声口，所述壳体的内部设有第一扬声器和第二扬声器，所述第一扬声器的前腔与所述前出声口连通，所述第一扬声器的后腔及所述第二扬声器的前腔均与所述后出声口连通，所述第二扬声器的后腔封闭；
其中，所述第一扬声器的后腔输出的声信号与所述第二扬声器的前腔输出的声信号相位相反，所述第一扬声器的后腔输出的声信号与所述第一扬声器的前腔输出的声信号相位 相反。
可选的，所述第二扬声器的数量为多个。
为解决上述技术问题，本申请还提供了一种发声设备的控制装置，发声设备为如上文任意一项所述的发声设备，该控制装置包括：
触发模块，用于当激活时生成触发信号；
控制模块，用于控制输出音频信号，还用于当接收到所述触发信号时生成第一控制信号，当未接收到所述触发信号时生成第二控制信号；
调整模块，用于当接收到所述第一控制信号，控制所述发声设备中的第一扬声器和第二扬声器输出基于所述音频信号的声信号，当接收到所述第二控制信号，控制所述第一扬声器输出基于所述音频信号的声信号，并控制所述第二扬声器不工作。
可选的，所述第二扬声器的数量为一个，当接收到所述第一控制信号时，所述调整模块控制所述发声设备中的第一扬声器和第二扬声器输出基于所述音频信号的声信号。
可选的，所述第二扬声器的数量为多个，当接收到所述第一控制信号时，所述调整模块控制所述发声设备中的第一扬声器和一个或多个第二扬声器输出基于所述音频信号的声信号。
可选的，所述触发模块为压力传感器、切换开关或噪声传感器中的一个或多个。
可选的，所述调整模块包括：
滤波补偿模块，用于调节所述音频信号各段频率的增益值和相位值；
与所述第一扬声器连接的第一功率放大模块，用于根据接收到的所述第一控制信号或所述第二控制信号调节所述音频信号各段频率的增益值，以使所述第一扬声器输出第一声信号或第二声信号；
与所述第二扬声器连接的第二功率放大模块，用于调节所述音频信号各段频率的增益值，以使所述第二扬声器输出第三声信号。
可选的，所述调整模块还包括：
设于所述第一功率放大模块与电源模块之间、用于当接收到所述第一控制信号或所述第二控制信号均闭合的第一开关；
设于所述第二功率放大模块与所述电源模块之间、用于当接收到所述第一控制信号闭合、当未接收到所述第一控制信号断开的第二开关。
可选的，所述滤波补偿模块为DSP。
为解决上述技术问题，本申请还提供了一种播放设备，包括：
如上文任意一项所述的发声设备；
如上文任意一项所述的发声设备的控制装置。
本申请提供了一种发声设备，包括两个扬声器，其中，第一扬声器的后腔与第二扬声器的前腔相连，在发声设备的后出声口处耦合，当只有第一扬声器工作时，发声设备的前出声口和后出声口输出的声信号幅值相近，相位相反，在水平方向上，远场具有明显的衰减效果，达到衰减向外界的声辐射的目的；当第一扬声器和第二扬声器均工作时，由于第二扬声器输出的声信号与第一扬声器的后腔输出的声信号相位相反，幅值相近，因此发声设备的后出声口输出的声信号被衰减，从而降低了对前出声口辐射声信号的强度的影响，明显减弱了对远场声信号的衰减，当外界环境噪声较大时，提高人耳处声信号灵敏度。本申请还提供了一种发声设备的控制装置及播放设备，具有和上述发声设备相同的有益效果。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，对于本领域默认技术人员而言，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中的一种发声设备的结构示意图；
图2为本申请所提供的一种发声设备的结构示意图；
图3为本申请所提供的另一种发声设备的结构示意图；
图4为本申请所提供的一种发声设备的控制装置的结构示意图；
图5为本申请所提供的另一种发声设备的控制装置的结构示意图；
图6为本申请所提供的另一种发声设备的控制装置的结构示意图；
图7为本申请所提供的一种播放设备的结构示意图。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
本申请的核心是提供一种播放设备、发声设备及其控制装置，既能够达到衰减向外界的声辐射的目的，也能够达到减弱对远场声信号的衰减，使得外界环境噪声较大时，提高人耳处声信号灵敏度的目的。
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，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他实施例，都属于本申请保护的范围。
请参照图2和图3，图2和图3均为本申请所提供的一种发声设备的结构示意图，该发声设备包括壳体01，壳体01设有前出声口011和后出声口012，壳体01的内部设有第一扬声器02和第二扬声器03，第一扬声器02的前腔与前出声口011连通，第一扬声器02的后腔及第二扬声器03的前腔均与后出声口012连通，第二扬声器03的后腔封闭；
其中，第一扬声器02的后腔输出的声信号与第二扬声器03的前腔输出的声信号相位相反，第一扬声器02的后腔输出的声信号与第一扬声器02的前腔输出的声信号相位相反。
参照图2所示，发声设备的壳体01设有前出声口011和后出声口012，二者相对设置，前出声口011即发声设备靠近人耳处的出声口。发声设备通过前出声口011和后出声口012向外辐射声信号。可以理解的是，前出声口011向外辐射的声信号和后出声口012向外辐射的声信号会在空气中叠加后到接收点。本申请中，发声设备包括第一扬声器02和第二扬声器03，第一扬声器02和第二扬声器03均设于发声设备的壳体01内。
可以理解的是，通过扬声器的前腔输出的声信号和其后腔输出的声信号叠加，使得人耳处可以接收到一定的声信号，而远场的接收点接收的声信号的衰减较多，同时为保证在高噪声环境下，人耳处接收到的声信号不被衰减，本申请的发声设备中的第一扬声器02、第二扬声器03及壳体01可采用如下结构，即第一扬声器02的前腔和壳体01的前出声口011连通，第一扬声器02的后腔和第二扬声器03的前腔连通，在壳体01的后出声口012处耦合，第二扬声器03的后腔封闭。
在上述结构的基础上，当第一扬声器02工作，且第二扬声器03不工作时，发声设备仅由第一扬声器02输出声信号，由于第一扬声器02的前腔输出的声信号和第一扬声器02的后腔输出的声信号幅值相近，相位相反，因此，壳体01的前出声口011向外辐射的声信号和壳体01的后出声口012向外辐射的声信号也是幅值相近，相位相反，在水平方向上，远场处具有明显的信号衰减效果，以此达到衰减向外界的声辐射的目的。当第一扬声器02和第二扬声器03均工作时，即发声设备由第一扬声器02和第二扬声器03同时输出声信号，由于第一扬声器02的后腔和第二扬声器03的前腔连通，且在壳体01的后出声 口012处耦合，又由于第一扬声器02的后腔输出的声信号与第二扬声器03的前腔输出的声信号相位相反，壳体01的后出声口012处的声信号被衰减，因此，壳体01的后出声口012处的声信号和前出声口011处的声信号的幅值不再相近，从而减小了对前出声口011的声信号的影响，明显减弱了对远场声信号的衰减，同时近场人耳处的声音响度会变大，从而使人耳处声信号灵敏度提高，并且控制远场声信号的指向性。
作为一种可选的实施例，第二扬声器03的数量为至少一个。
具体的，第二扬声器03可以设置一个，也可以设置多个，保证第二扬声器03的前腔与第一扬声器02的后腔连通，并在壳体01的后出声口012处耦合即可，本申请对第二扬声器03的数量以及其在壳体01内的排布相对位置不做具体的限定。
可见，本实施例中，发声设备包括两个扬声器，其中，第一扬声器02的后腔与第二扬声器03的前腔相连，在发声设备的后出声口012处耦合，当只有第一扬声器02工作时，发声设备的前出声口011和后出声口012输出的声信号幅值相近，相位相反，在水平方向上，远场具有明显的衰减效果，达到衰减向外界的声辐射的目的；当第一扬声器02和第二扬声器03均工作时，由于第二扬声器03输出的声信号与第一扬声器02的后腔输出的声信号相位相反，幅值相近，因此发声设备的后出声口012输出的声信号被衰减，从而降低了对前出声口011辐射声信号的强度的影响，明显减弱了对声信号的衰减，当外界环境噪声较大时，提高人耳处声信号灵敏度。
请参照图4，图4为本申请所提供的一种发声设备的控制装置的结构示意图，发声设备为如上文任意一个实施例所描述的发声设备，发声设备包括壳体，壳体设有前出声口和后出声口，壳体的内部设有第一扬声器02和第二扬声器03，第一扬声器02的前腔与前出声口连通，第一扬声器02的后腔及第二扬声器03的前腔均与后出声口连通，第二扬声器03的后腔封闭；
该控制装置包括：
触发模块11，用于当激活时生成触发信号；
控制模块12，用于控制输出音频信号，还用于当接收到触发信号时生成第一控制信号，当未接收到触发信号时生成第二控制信号；
调整模块13，用于当接收到第一控制信号，控制发声设备中的第一扬声器02和第二扬声器03输出基于音频信号的声信号，当接收到第二控制信号，控制第一扬声器02输出基于音频信号的声信号，并控制第二扬声器03不工作。
具体的，本实施例所提供的控制装置包括触发模块11、控制模块12和调整模块13，其中，触发模块11可以被用户手动激活，也可以根据预设条件自动激活。当触发模块11被激活时，可以认为当前需要减弱近场处(即人耳处)的声信号的衰减。因此，控制模块12可以根据是否接收到触发信号来选择发声设备中需要工作的扬声器，如由第一扬声器02单独工作，或由第一扬声器02和第二扬声器03共同工作。为便于描述，下文将需要第一扬声器02和第二扬声器03共同工作的模式称为模式一，将需要第一扬声器02单独工作的模式称为模式二，其中，当第二扬声器03有一个时，模式一为第一扬声器02和一个第二扬声器03共同工作，当第二扬声器03有多个时，模式一为根据用户需求来选择由第一扬声器02和一个或多个第二扬声器03共同工作。
具体的，控制模块12用于控制输出音频信号，并根据是否接收到触发信号生成对应的控制信号，若接收到触发信号，则生成第一控制信号，若未接收到触发信号，则生成第二控制信号。控制模块12可以选用MCU(Microcontroller Unit，微控制单元)或SOC(System on Chip，片上系统)实现，当然也可以选择其他能实现相同功能的器件实现，本实施例在此不作具体的限定。
具体的，调整模块13若接收到第一控制信号，使控制模块12控制输出的音频信号的相位和增益进行相应调整，并控制第一扬声器02和第二扬声器03分别输出基于该音频信号的声信号。此时，当第二扬声器03的数量为一个时，第一扬声器02和第二扬声器03同时工作，当第二扬声器03的数量为多个时，根据用户需求控制第一扬声器02和一个或者多个第二扬声器03共同工作，由于第二扬声器03的前腔输出的声信号与第一扬声器02的后腔输出的声信号相位相反，幅值相近，因此发声设备的后出声口输出的声信号被衰减。具体的，当第二扬声器03的数量为多个时，若外界环境噪音较大，选择第一扬声器02和较多数量的第二扬声器03共同工作，此时后出声口的声信号对前出声口辐射的声信号的强度的影响较小；若外界环境噪音较小，选择选择第一扬声器02和较少数量的第二扬声器03共同工作，此时后出声口的声信号对前出声口辐射的声信号的强度的影响较大，从而根据外界环境的不同使后出声口的声信号对前出声口辐射的声信号强度的减弱产生不同程度的影响，使远场水平方向消声效果减弱，近场人耳处收到的声音响度增大，从而达到提高人耳处信号灵敏度的目的。
具体的，调整模块13若接收到第二控制信号，使控制模块12控制输出的音频信号的相位和增益进行相应调整，控制第一扬声器02输出基于该音频信号的声信号，并控制第二扬声器03不工作。此时由于发声设备中只有第一扬声器02工作，因此，发声设备的壳 体的前出声口和后出声口向外辐射的声信号分别为第一扬声器02的前腔输出的声信号和第一扬声器02的后腔输出的声信号，此时，声信号的最大输出因为发声设备的前、后出声口的声短路现象而相对较小，在远场水平方向上具有消声效果，私密性较好。
作为一种可选的实施例，触发模块11为压力传感器、切换开关或噪声传感器中的一个或多个。
若采用压力传感器作为本实施例中的触发模块11，可以根据用户按压力度，即压力传感器采集到的压力值大小确定触发模块11是否被激活，当压力值大于或等于预设压力值时，触发模块11被激活，生成触发信号，当需要输出音频信号时，控制模块12按模式一控制发声设备工作，当第二扬声器03的数量为一个时，控制第一扬声器02和第二扬声器03工作，当第二扬声器03的数量为多个时，根据压力值的大小设置不同压力级别，根据不同压力级别控制第一扬声器02和对应数量的第二扬声器03工作；当压力值小于预设压力值或无压力值时，触发模块11未被激活，不生成触发信号，当需要输出音频信号时，控制模块12按模式二控制发声设备工作。
若采用切换开关作为本实施例中的触发模块11，可以根据切换开关的位置信号确定触发模块11是否被激活，当切换开关的位置信号对应第一位置时，触发模块11被激活，生成触发信号，当需要输出音频信号时，控制模块12按模式一控制发声设备工作，当第二扬声器03的数量为一个时，控制第一扬声器02和第二扬声器03工作，当第二扬声器03的数量为多个时，根据切换开关的不同位置设置不同触发信号，根据不同触发信号控制第一扬声器02和对应数量的第二扬声器03工作；当切换开关的位置信号对应第二位置时，触发模块11未被激活，不生成触发信号，当需要输出音频信号时，控制模块12按模式二控制发声设备工作。
若采用噪声传感器作为本实施例中的触发模块11，可以根据发声设备所处环境的噪声值来确定触发模块11是否激活，当噪声值大于或等于预设噪声值，触发模块11被激活，生成触发信号，当需要输出音频信号时，控制模块12按模式一控制发声设备工作，当第二扬声器03的数量为一个时，控制第一扬声器02和第二扬声器03工作，当第二扬声器03的数量为多个时，根据噪声值的大小设置不同噪声级别，根据不同噪声级别控制第一扬声器02和对应数量的第二扬声器03工作，例如，当第二扬声器03的数量为3个时，噪声值大于60分贝时，触发模块11被激活，生成触发信号，当噪声值在60-70分贝时，生成第一触发信号，此时控制第一扬声器02和一个第二扬声器03工作，当噪声值在70-80分贝时，生成第二触发信号，此时控制第一扬声器02和两个第二扬声器03工作，当噪声 值大于80分贝时，生成第三触发信号，此时控制第一扬声器02和三个第二扬声器03工作；当噪声值小于预设噪声值时，触发模块11未被激活，不生成触发信号，当需要输出音频信号时，控制模块12按模式二控制发声设备工作。作为一种可选的实施例，可以通过播放设备中既有的麦克风来采集噪声，从而减少硬件成本。
当然，触发模块11、控制模块12除了可以选用上述器件实现，还可以通过其他器件实现，能实现相同的功能即可，本实施例在此不做具体的限定。
作为一种可选的实施例，调整模块13包括：
滤波补偿模块131，用于调节音频信号各段频率的增益值和相位值；
与第一扬声器02连接的第一功率放大模块132，用于根据接收到的第一控制信号或第二控制信号调节音频信号各段频率的增益值，以使第一扬声器02输出第一声信号或第二声信号；
与第二扬声器03连接的第二功率放大模块133，用于调节音频信号各段频率的增益值，以使第二扬声器03输出第三声信号。
具体的，第二功率放大模块133的个数和第二扬声器03的个数相同，当第二扬声器03为一个时，调整模块13包括一个第二功率放大模块133，当第二扬声器03为多个时，调整模块13包括多个第二功率放大模块133，各个功率放大模块133和多个第二扬声器03一一对应连接。发声设备工作在模式一和模式二时，滤波补偿模块131、功率放大模块分别对应的不同的配置参数，在不同配置参数下，第一扬声器02和第二扬声器03可以基于音频信号输出不同的声信号。当需要控制发声设备工作在模式一时，选用模式一的滤波器配置参数和PA增益配置参数配置滤波补偿模块131、第一功率放大模块132和每个第二功率放大模块133；当需要控制发声设备工作在模式二时，选用模式二的滤波器配置参数和PA增益配置参数配置滤波补偿模块131和第一功率放大模块132，其中，滤波器配置参数包括各段频率的增益值和相位值。可以理解的是，第一功率放大模块132有两套PA增益配置参数，一套应用于模式一，另一套应用于模式二，而每个第二功率放大模块133有一套PA增益配置参数，应用于模式一。
为便于理解，下文仅以发声设备包括一个第二扬声器03，调整模块13包括一个第二功率放大模块133为例对本申请的控制过程进行说明。发声设备包括多个第二扬声器03以及调整模块13包括多个第二功率放大模块133时，当根据用户需求确定需要工作的第二扬声器03后，对每个第二扬声器03的控制过程，同理。
具体的，当触发模块11未被激活，控制发声设备工作在模式二，参照图5所示控制 逻辑，控制模块12发出第二控制信号，通过第二控制信号控制滤波补偿模块131选用模式二的滤波器配置参数，并控制第一功率放大模块132选用模式二的PA增益配置参数，滤波补偿模块131通过模式二的滤波器配置参数对控制模块12输出的音频信号进行调整，相应的，第一功率放大模块132通过模式二的PA增益配置参数对滤波补偿模块131调整后的音频信号继续进行调整，然后通过第一扬声器02输出。由于此时的发声设备中仅第一扬声器02工作，发声设备的前、后出声口输出的声信号分别为第一扬声器02前腔和第一扬声器02的后腔输出的声信号，而第一扬声器02前腔和第一扬声器02的后腔输出的声信号幅值相近，相位相反，因此，在模式二下，声信号的最大输出因为前后出声口的声短路现象相对较小，但是在远场水平方向具有消声效果，因此具有较好的私密性。
具体的，当触发模块11被激活，控制发声设备工作在模式一，参照图6所示控制逻辑，控制模块12发出第一控制信号，通过第一控制信号控制滤波补偿模块131选用模式一的滤波器配置参数，控制第一功率放大模块132选用模式一的PA增益配置参数，同时控制第二功率放大模块133开始工作。此时，由于第二扬声器03也开始工作，因此，第一扬声器02的后出声口输出的声信号被衰减，降低了后出声口的声信号对前出声口辐射的声信号的强度的影响，远场水平方向消声效果变弱，近场人耳处收到的声音响度会增大，从而在外界噪声较大时，达到提高人耳处信号灵敏度的目的。
考虑到当发声设备切换至模式一工作时，人耳处收到的声音响度会增大，为避免声音响度突然增大给用户带来的不良体验，可设置第一功率放大模块在模式一的PA增益参数小于其在模式二的PA增益参数，具体的，模式一的PA增益值可比模式二的PA增益值小7dB。
可以理解的是，若第一功率放大模块的PA增益参数在模式一和模式二选择同等增益值，发声设备在模式一有更大的声信号输出，所以模式一的最大声音输出会比模式二要更大，因此，模式一适合在不需要私密需求，对输出信号大小要求较高的嘈杂环境下使用。综上所述，本申请可实现在不同需求下变更发声设备的工作模式，控制向外界的声辐射，以及控制声信号输出的上限，对带宽的影响非常小。
作为一种可选的实施例，当第二扬声器03有多个时，每个第二功率放大模块133可以选用相同的PA增益配置参数也可以选用不同的PA增益配置参数。当各个第二功率放大模块133选用相同的PA增益配置参数，后续应用过程中，可直接根据用户需求选择对应数目的第二扬声器03工作，以使一个或多个第二扬声器03输出满足用户需求的声信号，比如噪声值越大，可选用越多数目的第二扬声器03同时工作。当各个第二功率放大模块 133选用不同的PA增益配置参数，后续应用过程中，可根据用户需求来选择对应的PA增益配置参数的第二功率放大模块133工作，例如，根据当前噪声值确定需要第二扬声器03输出的声信号的大小，从而选择对应的PA增益配置参数的第二功率放大模块133工作，以使一个或多个第二扬声器03输出满足用户需求的声信号。
作为一种可选的实施例，调整模块13还包括：
设于第一功率放大模块132与电源模块之间、用于当接收到第一控制信号或第二控制信号均闭合的第一开关；
设于第二功率放大模块133与电源模块之间、用于当接收到第一控制信号闭合、当未接收到第一控制信号断开的第二开关。
具体的，在电源模块和第一功率放大模块132的供电端之间还设有第一开关，相应的，在电源模块和每一第二功率放大模块133的供电端之间还设有第二开关，控制模块12可以通过控制第一开关和第二开关的导通或断开，来控制第一功率放大模块132、第二功率放大模块133是否需要工作，可以理解的是，当第二功率放大模块133不工作时，无信号传输至第二扬声器03，此时第二扬声器03不工作。通过切断或导通供电通路的方式来控制功率放大模块的状态，提高了控制精准性和可靠性。
作为一种可选的实施例，滤波补偿模块131为DSP。
具体的，滤波补偿模块131可以选择DSP实现，也可以选择模拟电路实现，能够达到调整各段频率增益的大小和相位的目的即可，本申请在此不作具体地限定。
请参照图7，图7为本申请所提供的一种播放设备的结构示意图，该播放设备包括：
如上文任意一个实施例所描述的发声设备21；
如上文任意一个实施例所描述的发声设备21的控制装置22。
具体的，本申请可应用于所有头戴播放设备或挂耳播放设备，如智能眼镜，AR/蓝牙耳机以及所有在进耳场景下使用的声音播放设备。
对于本申请所提供的一种播放设备的介绍请参照上述实施例，本申请在此不再赘述。
本申请所提供的一种播放设备具有和上述发声设备21及控制装置22相同的有益效果。
还需要说明的是，在本说明书中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间 存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的状况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其他实施例中实现。因此，本申请将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。
以上仅为本申请的优选实施例，并非因此限制本申请的专利范围，凡是利用本申请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他相关的技术领域，均同理包括在本申请的专利处理范围内。

Claims (10)

  1. 一种发声设备，其特征在于，包括壳体，所述壳体设有前出声口和后出声口，所述壳体的内部设有第一扬声器和第二扬声器，所述第一扬声器的前腔与所述前出声口连通，所述第一扬声器的后腔及所述第二扬声器的前腔均与所述后出声口连通，所述第二扬声器的后腔封闭；
    其中，所述第一扬声器的后腔输出的声信号与所述第二扬声器的前腔输出的声信号相位相反，所述第一扬声器的后腔输出的声信号与所述第一扬声器的前腔输出的声信号相位相反。
  2. 根据权利要求1所述的发声设备，其特征在于，所述第二扬声器的数量为多个。
  3. 一种发声设备的控制装置，其特征在于，发声设备为如权利要求1-2任意一项所述的发声设备，该控制装置包括：
    触发模块，用于当激活时生成触发信号；
    控制模块，用于控制输出音频信号，还用于当接收到所述触发信号时生成第一控制信号，当未接收到所述触发信号时生成第二控制信号；
    调整模块，用于当接收到所述第一控制信号，控制所述发声设备中的第一扬声器和第二扬声器输出基于所述音频信号的声信号，当接收到所述第二控制信号，控制所述第一扬声器输出基于所述音频信号的声信号，并控制所述第二扬声器不工作。
  4. 根据权利要求3所述的控制装置，其特征在于，所述第二扬声器的数量为一个，当接收到所述第一控制信号时，所述调整模块控制所述发声设备中的第一扬声器和第二扬声器输出基于所述音频信号的声信号。
  5. 根据权利要求3所述的控制装置，其特征在于，所述第二扬声器的数量为多个，当接收到所述第一控制信号时，所述调整模块控制所述发声设备中的第一扬声器和一个或多个第二扬声器输出基于所述音频信号的声信号。
  6. [根据细则26改正08.08.2022]　
    根据权利要求3所述的控制装置，其特征在于，所述触发模块为压力传感器、切换开关或噪声传感器中的一个或多个。
  7. 根据权利要求3所述的控制装置，其特征在于，所述调整模块包括：
    滤波补偿模块，用于调节所述音频信号各段频率的增益值和相位值；
    与所述第一扬声器连接的第一功率放大模块，用于根据接收到的所述第一控制信号或所述第二控制信号调节所述音频信号各段频率的增益值，以使所述第一扬声器输出第一声信号或第二声信号；
    与所述第二扬声器连接的第二功率放大模块，用于调节所述音频信号各段频率的增益 值，以使所述第二扬声器输出第三声信号。
  8. 根据权利要求5所述的控制装置，其特征在于，所述调整模块还包括：
    设于所述第一功率放大模块与电源模块之间、用于当接收到所述第一控制信号或所述第二控制信号均闭合的第一开关；
    设于所述第二功率放大模块与所述电源模块之间、用于当接收到所述第一控制信号闭合、当未接收到所述第一控制信号断开的第二开关。
  9. 根据权利要求5所述的控制装置，其特征在于，所述滤波补偿模块为DSP。
  10. 一种播放设备，其特征在于，包括：
    如权利要求1-2任意一项所述的发声设备；
    如权利要求3-9任意一项所述的发声设备的控制装置。
PCT/CN2022/105082 2021-07-27 2022-07-12 一种播放设备、发声设备及其控制装置 Ceased WO2023005654A1 (zh)

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