CN216649979U - Loudspeaker module and electronic equipment - Google Patents
Loudspeaker module and electronic equipment Download PDFInfo
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Abstract
The utility model relates to a loudspeaker module and electronic equipment, the loudspeaker module includes: the casing and accept in speaker and intelligent power amplifier in the casing, intelligent power amplifier with the speaker is connected, intelligent power amplifier includes interconnect's first detection module and digital audio processor, first detection module is used for surveying the acoustic characteristic of the second sound signal of broadcast when the first sound signal of speaker output, and feed back to digital audio processor. The utility model can directly detect the acoustic characteristics of the sound signal output by the loudspeaker when playing, and feed back the acoustic characteristics to the digital audio processor so as to quickly determine whether the sound played by the loudspeaker is distorted, and quickly adjust the sound signal when the sound is distorted, thereby ensuring the sound effect and improving the use experience of a user; and can guarantee that the speaker module is no longer than maximum amplitude and temperature resistant under extreme operating condition, avoid the speaker module to damage, guarantee the life of speaker module.
Description
Technical Field
The utility model relates to the technical field of loudspeakers, in particular to a loudspeaker module and electronic equipment.
Background
In order to improve and break through the final sound effect that the micro-speaker can provide, in the prior art, a Smart power amplifier (Smart AMP) is usually used to output power exceeding the rated power of the speaker to drive the micro-speaker to operate, and meanwhile, an I/V related algorithm is used to detect the temperature and amplitude of the speaker during operation, so as to ensure that the speaker is not damaged due to the fact that the speaker can bear the temperature and amplitude under the condition of over-power operation.
In order to prevent the increase of the sound distortion, in the prior art, redundancy of the output of the intelligent power amplifier is usually set to ensure that the intelligent power amplifier does not output excessive power to generate excessive distortion, or some frequency bands with large distortion are manually limited, but both the redundancy setting and the manual limitation reduce the performance of the whole loudspeaker to some extent. In addition, the performance tolerance of the loudspeaker is large due to certain tolerance and installation tolerance of the parts of the loudspeaker, such as the voice coil, the diaphragm, the magnet, glue and the like, for example, the tolerance of the frequency response platform reaches more than +/-3dB, and the certain tolerance can affect the sound performance of the notebook computer product. In order to ensure the audio performance of the loudspeaker, the loudspeaker module is changed into full-automatic production, so that the influence caused by assembly tolerance is reduced, the frequency response specification is improved to a certain extent by the automatic production, and the influence caused by tolerance of parts cannot be solved.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a loudspeaker module and electronic equipment, which can solve the technical problem that the sound performance of a loudspeaker is poor under the condition of over-power work in the prior art.
The embodiment of the utility model provides a loudspeaker module, which comprises: the casing and accept in speaker and intelligent power amplifier in the casing, intelligent power amplifier with the speaker is connected, intelligent power amplifier includes interconnect's first detection module and digital audio processor, first detection module is used for surveying the acoustic characteristic of the second sound signal of broadcast when the first sound signal of speaker output, and feed back to digital audio processor.
In some embodiments, the first detection module is mounted to the housing, and the first detection module is disposed near the speaker.
In some embodiments, the housing is provided with a sound outlet corresponding to the speaker, and the sound outlet and the mounting port for mounting the first detection module are disposed on the same side of the housing.
In some embodiments, the first detection module has a sensitivity of less than-36 dBFS and the first detection module is subject to a sound pressure of greater than 120 dBSPL.
In some embodiments, the digital audio processor comprises:
the acquisition unit is respectively connected with the loudspeaker and the first detection module so as to respectively acquire the first sound signal and the second sound signal;
the processing unit is connected with the acquisition unit and used for outputting an adjusting signal according to the first sound signal and the second sound signal;
and the output unit is connected between the processing unit and the loudspeaker and used for receiving the adjusting signal and outputting the adjusting signal to the loudspeaker.
In some embodiments, the intelligent power amplifier further includes a power amplification module, connected between the digital audio processor and the speaker, for amplifying the adjustment signal and outputting the amplified adjustment signal.
In some embodiments, the smart power amplifier further includes a second detection module, connected to the digital audio processor, for detecting the current and/or voltage of the speaker module and feeding the detected current and/or voltage back to the digital audio processor.
In some embodiments, the speaker module further includes an environment sensor, and the environment sensor is connected to the intelligent power amplifier, and is configured to detect a temperature and/or a humidity of the speaker module and feed the temperature and/or the humidity back to the intelligent power amplifier.
The embodiment of the utility model also provides electronic equipment comprising the loudspeaker module.
In some embodiments, the electronic device further comprises a main controller connected with the intelligent power amplifier through an I2S audio bus
According to the loudspeaker module and the electronic equipment provided by various embodiments of the utility model, the first detection module is integrated in the intelligent power amplifier, so that the acoustic characteristics of the sound signal output when the loudspeaker is played can be directly detected, and the acoustic characteristics are fed back to the digital audio processor, so that whether the sound played by the loudspeaker is distorted or not can be quickly determined, the sound effect can be quickly adjusted when the sound is distorted, and the use experience of a user can be improved; meanwhile, the loudspeaker module can be guaranteed not to exceed the maximum amplitude and resist temperature in the extreme working state, damage to the loudspeaker module is avoided, and the service life of the loudspeaker module is guaranteed; in addition, the loudspeaker module provided by the embodiment of the utility model can automatically adjust the loudspeaker module according to the sound information acquired by the first detection module in real time, redundancy or manual adjustment is not required, distortion caused by the loudspeaker module can be adjusted, and the overall performance of the loudspeaker module can be effectively ensured.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the claimed embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
Fig. 1 is a schematic structural diagram of a speaker module according to an embodiment of the utility model;
fig. 2 is a schematic structural diagram of a speaker module according to an embodiment of the utility model;
fig. 3 is a schematic structural diagram of a speaker module according to an embodiment of the utility model;
fig. 4 shows a frequency response graph of a speaker module according to an embodiment of the present invention.
Reference numerals:
10-a loudspeaker module and 20-a main controller;
1-shell, 11-mounting port, 12-sound outlet; 2-a loudspeaker; 3-intelligent power amplifier, 31-first detection module, 311-conversion unit, 32-digital audio processor, 321-acquisition unit, 322-processing unit, 323-output unit, 33-power amplification module, 34-second detection module; 4-an environmental sensor; 5-initializing the module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Fig. 1 to 3 are schematic structural diagrams of a speaker module according to an embodiment of the present invention. As shown in fig. 1 to 3, an embodiment of the present invention provides a speaker module 10, including: the loudspeaker 2 and intelligent power amplifier (Smart PA)3 that the casing 1 was received to casing 1, and intelligent power amplifier 3 is connected with loudspeaker 2, and intelligent power amplifier 3 includes interconnect's first detection module 31 and digital audio processor (DSP)32, and first detection module 31 is used for detecting the acoustic characteristic of the second sound signal that plays when loudspeaker 2 outputs first sound signal, and feeds back to digital audio processor 32.
The first sound signal is a sound signal (input signal) to be played input to the speaker 2, and the second sound signal is a sound signal (output signal) actually played when the speaker 2 plays the first sound signal. The acoustic characteristics of the second sound signal include frequency, amplitude, phase, etc. sound information.
The speaker module 10 provided by the embodiment of the present invention integrates the first detection module 31 in the intelligent power amplifier 3, so as to directly detect the acoustic characteristics of the sound signal output by the speaker 2 during playing, and feed the acoustic characteristics back to the digital audio processor 32, so as to quickly determine whether the sound played by the speaker 2 is distorted, and quickly adjust the sound signal during distortion, thereby ensuring the sound effect and improving the user experience; meanwhile, the embodiment can ensure that the loudspeaker module does not exceed the maximum amplitude and is temperature resistant under the extreme working state (exceeding the rated power), avoid the loudspeaker module 10 from being damaged, and ensure the service life of the loudspeaker module 10; in addition, the speaker module 10 according to the embodiment of the present invention can automatically adjust the speaker module 10 according to the sound information obtained by the first detection module 31 in real time, without setting redundancy or manual adjustment, and can adjust distortion caused by the speaker module 10 itself (for example, a certain tolerance exists), so as to effectively ensure the overall performance of the speaker module 10.
In some embodiments, as shown in fig. 1, the first detecting module 31 is mounted on the housing 1, and the first detecting module 31 is disposed near the speaker 2.
Specifically, a mounting opening 11 for mounting the first detecting module 31 may be formed in the housing 1, and the first detecting module 31 is embedded in the mounting opening 11 so as to detect the second sound signal, and the digital audio processor 32 is located in the housing 1.
Furthermore, a sound outlet 12 corresponding to the speaker 2 is arranged on the housing 1, and the sound outlet 12 and the mounting port 11 for mounting the first detecting module 31 are arranged on the same side of the housing 1, so that the sound emitted by the speaker 2 can be rapidly detected by the first detecting module 31 on the same side of the housing 1.
In a specific implementation, the positions of the mounting opening 11 and the sound outlet 12 may also be determined according to actual needs, for example, the mounting opening 11 and the sound outlet 12 may be respectively disposed on two adjacent side walls of the housing 1 and at positions close to each other.
In the specific implementation, the positions of the mounting port 11 and the sound outlet 12 can not be set to be close to each other, so as to prevent the sound signals played back and forth from mixing and affecting the detection effect.
In some embodiments, the sensitivity of the first detection module 31 is less than-36 dBFS, and the sound pressure received by the first detection module 31 is greater than 120 dBSPL.
The first detecting module 31 has a low sensitivity to detect the second sound signal, and a high sound pressure resistance to prevent the first detecting module 31 from being damaged, thereby prolonging the service life thereof.
Preferably, the first detecting module 31 is a sound pressure detecting module, which can detect the sound pressure of the air.
Further, as shown in fig. 3, the first detecting module 31 further includes a converting unit 311, which can convert the detected sound pressure signal into the acoustic characteristics such as the frequency, amplitude, phase, etc. For example, the received sound pressure signal may be converted into an amplitude signal by the conversion unit 311 and transferred to the digital audio processor 32.
The digital audio processor 32 may compare the second sound signal fed back by the first detecting module 31 with the first sound signal, extract a distortion signal in the second sound signal, and then process the distortion signal to ensure the sound performance of the output second sound signal.
In this embodiment, the distortion signal is mainly a harmonic distortion signal. Harmonic distortion refers to distortion that occurs when the loudspeaker 2 reproduces sound due to the inevitable resonance phenomenon (generation of second, third, or even multiple harmonics based on the original sound wave) during operation of the loudspeaker 2. Since the second sound signal is no longer only the fundamental frequency signal of the first sound signal, but also includes harmonics and frequency-doubled components thereof, these frequency-doubled signals may cause distortion when the speaker 2 plays. That is, the first sound signal only includes the fundamental frequency signal, and the second sound signal includes both the fundamental frequency signal and the distortion signal. That is, the present embodiment can adjust distortion caused by the speaker module 10 itself (for example, a certain tolerance exists), and can effectively ensure the overall performance of the speaker module 10.
In some embodiments, as shown in FIG. 3, digital audio processor 32 includes:
an obtaining unit 321, respectively connected to the speaker 2 and the first detecting module 31, for respectively obtaining a first sound signal and a second sound signal;
a processing unit 322, connected to the obtaining unit 321, for outputting an adjustment signal according to the first sound signal and the second sound signal;
and an output unit 323 connected between the processing unit 322 and the speaker 2, for receiving the adjustment signal and outputting the adjustment signal to the speaker 2.
The obtaining unit 321 may obtain the frequency, amplitude, phase and other acoustic characteristics of the first sound signal in a frequency sweep manner. In this embodiment, the obtaining unit 321 may obtain first fundamental frequency amplitude signals corresponding to the fundamental frequency signals of the first sound signal. The obtaining unit 321 receives a second sound signal fed back by the first detecting module 31, where the second sound signal includes a second fundamental frequency amplitude signal of the fundamental frequency signal corresponding to the first sound signal and a distortion amplitude signal of the distortion signal generated due to resonance.
The processing unit 322 compares the first sound signal with the second sound signal, separates a second fundamental frequency amplitude signal corresponding to each fundamental frequency signal and a distortion amplitude signal corresponding to each distortion signal from the second sound signal according to a first fundamental frequency amplitude signal corresponding to each fundamental frequency signal in the first sound signal, and calculates a distortion factor when the speaker 2 plays, where the distortion factor is a distortion factor of a mixed distortion signal weighted by each frequency distortion signal. If the distortion level is greater than a certain threshold (e.g., 5%), it may be determined that distortion is present for the speaker 2.
The distortion factor can be calculated by the following formula:
wherein,
mixed distortion signal weighted by distortion amplitude signal of each distortion signal, VtIs the sum of the amplitudes of all the second fundamental frequency amplitude signals and the distortion amplitude signals in the second sound signal.
After determining that the loudspeaker 2 has distortion, the processing unit 322 may determine a frequency that is likely to generate distortion according to a ratio of each frequency in the distortion signal, further generate a corresponding adjustment signal to reduce the distortion, and output the adjustment signal to the loudspeaker 2 through the output unit 323, thereby improving the sound performance of the loudspeaker 2.
In some embodiments, the processing unit 322 specifically includes a frequency response adjusting unit, and the frequency response adjusting unit may generate a frequency adjusting signal according to a frequency that is easy to generate distortion in the distortion signal, and adjust the first sound signal (original signal) to be input to the speaker 2.
For example, when acquiring the first sound signal to be played in the next frame, the processing unit 322 may compare the first sound signal with a larger distortion degree (the first sound signal that is likely to generate distortion) before, and if the difference between the first sound signal and the first sound signal is not large, determine that there is distortion when the first sound signal to be played in the next frame is played, so that the frequency response adjustment is performed by generating the frequency adjustment signal using the distortion signal in the previous frame.
Specifically, the low-frequency and high-frequency signals that cannot be responded in the speaker 2 can be filtered from the first sound signal to be played according to the actual response capability of the speaker 2, so that the amplitude of the first sound signal to be output is reduced, the speaker 2 is always in a non-full working state, the sound purity (meeting a target distortion degree) is ensured, and the sound effect can be effectively improved.
If the difference between the first audio signal to be played in the next frame and the first audio signal with the larger distortion degree is larger, it can be determined that the first audio signal to be played in the next frame is not easy to generate distortion. Further, it is possible to determine whether or not a frequency signal that is likely to cause high distortion (for example, the frequency signal determined from the frequency ratio) is present in the first audio signal, and if so, generate a frequency adjustment signal, and perform frequency response adjustment as in the above-described processing when the difference from the first audio signal having a large degree of distortion is large; if the frequency signal which is easy to generate high distortion does not exist, the first sound signal to be played can be directly played without adjusting the first sound signal to be played, and the played first sound signal meets the requirement of sound purity.
In some embodiments, the processing unit 322 further includes a compensation subunit, which can adjust the second sound signal played in real time, for example, can generate an inverse adjustment signal according to the distortion signal to compensate the second sound signal. In this embodiment, the reverse adjustment signal is preferably an anti-phase signal having a phase opposite to that of the distortion signal, and the anti-phase signal is superimposed and output to the speaker 2, so that the speaker 2 outputs the first sound signal to play the second sound signal, and simultaneously the anti-phase signal is used to completely cancel the distortion signal in the second sound signal, thereby effectively improving the sound effect.
As can be seen from the above, in this embodiment, after it is determined that the loudspeaker 2 has distortion, not only can the distortion be suppressed through frequency adjustment, but also the suppression can be performed through generating a reverse signal, so that the sound purity can be effectively ensured, the maximum volume and the best low-frequency performance can be output under the condition that the sound purity is satisfied, and the user experience is improved.
In some embodiments, as shown in fig. 2 and fig. 3, the smart power amplifier 3 further includes a power amplifying module 33, connected between the digital audio processor 32 and the speaker 2, for amplifying the adjustment signal and outputting the amplified adjustment signal, so as to provide a signal with a larger gain for the speaker 2, thereby ensuring the output sound quality of the speaker 2.
In some embodiments, as shown in fig. 3, the smart power amplifier 3 further includes a second detecting module 34, and the second detecting module 34 is connected to the digital audio processor 32 for detecting the current and/or voltage of the speaker module 10 and feeding the detected current and/or voltage back to the digital audio processor 32.
The second detecting module 34 can detect the voltage and the passing current at two ends of the speaker 2 in real time, determine the working power of the speaker 2 according to the detected working parameters, and further adjust the amplitude of the speaker 2 according to the working power of the speaker 2 in cooperation with the first detecting module 31 and the digital audio processor 32, so that the speaker 2 can have better sound performance under the condition of over-power working, and can effectively prevent the speaker 2 from being damaged due to the over-high amplitude or working temperature of the speaker 2.
In some embodiments, as shown in fig. 3, the speaker module 10 further includes an environment sensor 4, and the environment sensor 4 is connected to the intelligent power amplifier 3 for detecting the temperature and/or humidity of the speaker module 10 and feeding back to the intelligent power amplifier 3.
The intelligent power amplifier 3 can cooperate the above-mentioned first acoustic characteristic that detects the second sound signal of broadcast, real-time adjustment speaker 2's broadcast parameter according to the temperature and/or humidity that speaker module 10 that environmental sensor 4 detected, for speaker 2 can be under the great environment of difference, under the very big change circumstances of speaker 2's characteristic appearance, still can output natural sound, guarantees speaker 2's sound performance.
In some embodiments, as shown in fig. 3, the speaker module 10 further includes an initialization module 5, which may perform initialization configuration on parameters of the speaker module 10.
In this embodiment, the initialization module 5 is a frequency response initialization module, and may perform frequency response initialization calibration, as shown in fig. 4, the initialization module 5 may compare an acoustic frequency response output characteristic (e.g., a frequency-sound pressure curve) of the speaker module 10 with a target frequency response curve through testing, and automatically adjust an equalizer of the intelligent power amplifier 3, so that the acoustic frequency response output characteristic of the speaker module 10 conforms to the target frequency response curve, thereby ensuring the working performance of the subsequent speaker module 10 during working.
The speaker module 10 provided in this embodiment can homogenize the characteristics of the speaker module 10, and ensure a uniform and better sound performance after the system is finely tuned.
The embodiment of the utility model further provides an electronic device, which comprises the loudspeaker module 10.
The electronic device may be a mobile terminal device such as a notebook computer, a tablet computer, a mobile phone, a vehicle-mounted device, and a wearable device (e.g., a smart watch, a smart bracelet, and a pedometer), and may also be a fixed terminal device such as a desktop computer and a digital TV.
As shown in fig. 2, the electronic device further includes a main controller 20, and the main controller 20 is connected to the intelligent power amplifier 3 through an I2S audio bus. The main controller 20 may be a CPU chip or the like.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents of the utility model may be made by those skilled in the art within the spirit and scope of the utility model, and such modifications and equivalents should also be considered as falling within the scope of the utility model.
Claims (10)
1. A speaker module, comprising: the casing and accept in speaker and intelligent power amplifier in the casing, intelligent power amplifier with the speaker is connected, intelligent power amplifier includes interconnect's first detection module and digital audio processor, first detection module is used for surveying the acoustic characteristic of the second sound signal of broadcast when the first sound signal of speaker output, and feed back to digital audio processor.
2. The speaker module as claimed in claim 1, wherein the first detecting module is mounted on the housing, and the first detecting module is disposed close to the speaker.
3. The speaker module as claimed in claim 2, wherein the housing has a sound outlet corresponding to the speaker, and the sound outlet and the mounting port for mounting the first detecting module are disposed on the same side of the housing.
4. The speaker module as claimed in claim 1, wherein the sensitivity of the first detection module is less than-36 dBFS, and the sound pressure received by the first detection module is greater than 120 dBSPL.
5. The speaker module as claimed in claim 1, wherein the digital audio processor comprises:
the acquisition unit is respectively connected with the loudspeaker and the first detection module so as to respectively acquire the first sound signal and the second sound signal;
the processing unit is connected with the acquisition unit and is used for outputting an adjusting signal according to the first sound signal and the second sound signal;
and the output unit is connected between the processing unit and the loudspeaker and used for receiving the adjusting signal and outputting the adjusting signal to the loudspeaker.
6. The speaker module as claimed in claim 5, wherein the smart power amplifier further comprises a power amplifying module connected between the digital audio processor and the speaker for amplifying the adjustment signal and outputting the amplified adjustment signal.
7. The speaker module as claimed in claim 1, wherein the smart power amplifier further comprises a second detection module, the second detection module is connected to the digital audio processor, and is configured to detect the current and/or voltage of the speaker module and feed the detected current and/or voltage back to the digital audio processor.
8. The speaker module as claimed in claim 1, further comprising an environment sensor connected to the smart power amplifier for detecting the temperature and/or humidity of the speaker module and feeding back the detected temperature and/or humidity to the smart power amplifier.
9. An electronic device comprising the speaker module according to any one of claims 1 to 8.
10. The electronic device of claim 9, further comprising a master controller, the master controller connected to the smart power amplifier via an I2S audio bus.
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| CN202123018517.8U CN216649979U (en) | 2021-12-03 | 2021-12-03 | Loudspeaker module and electronic equipment |
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| CN202123018517.8U CN216649979U (en) | 2021-12-03 | 2021-12-03 | Loudspeaker module and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116668904A (en) * | 2022-12-21 | 2023-08-29 | 荣耀终端有限公司 | Audio circuit and electronic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116668904A (en) * | 2022-12-21 | 2023-08-29 | 荣耀终端有限公司 | Audio circuit and electronic device |
| CN116668904B (en) * | 2022-12-21 | 2024-04-12 | 荣耀终端有限公司 | Audio circuit and electronic device |
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