CN114724580A - Audio signal regulation and control method and loudspeaker system - Google Patents
Audio signal regulation and control method and loudspeaker system Download PDFInfo
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- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
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- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/003—Changing voice quality, e.g. pitch or formants
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
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Abstract
The invention discloses an audio signal regulation and control method, which comprises the following steps: the method comprises the steps of accessing an original audio signal, inputting the original audio signal into a post-processing module for adjustment, and obtaining a first audio signal; adjusting the gain of the original audio signal to obtain a second audio signal; filtering the medium and high frequency signals in the second audio signal to obtain a third audio signal; equalizing and adjusting the third audio signal to obtain a fourth audio signal; performing dynamic range control on the fourth audio signal to obtain a fifth audio signal; and carrying out amplitude limiting on the fifth audio signal to obtain a sixth audio signal. A loudspeaker system comprises a sound source input, a multichannel independently controlled digital signal processor, a power amplifier, a box body, a first loudspeaker unit and a second loudspeaker unit, wherein the first loudspeaker unit and the second loudspeaker unit respectively receive two audio signals obtained by respectively amplifying a first audio signal and a sixth audio signal.
Description
Technical Field
The application relates to the technical field of acoustics, in particular to an audio signal regulation and control method and a loudspeaker system.
Background
With the continuous development of science and technology, various types of speakers are developed endlessly, and good hearing enjoyment is brought to people. The existing sound output effect of the loudspeaker is not only related to the quality of the loudspeaker, but also plays a significant role in the tone quality of output sound in an audio frequency regulation and control mode.
For the loudspeaker boxes of two reverse vibration loudspeakers arranged in the same box body, the effect of improving the sound quality of the output sound of the loudspeakers through traditional audio frequency regulation and control audio signal output is poor.
Disclosure of Invention
The invention mainly aims at the problems, provides an audio signal regulation and control method and a loudspeaker system, and aims to solve the technical problems in the background technology.
In order to achieve the above object, the present invention provides an audio signal conditioning method applied to a speaker, the method comprising:
the method comprises the steps of accessing an original audio signal, inputting the original audio signal into a post-processing module for adjustment, and obtaining a first audio signal;
adjusting the gain of the original audio signal to obtain a second audio signal; filtering out the medium and high frequency signals in the second audio signal to obtain a third audio signal;
carrying out equalization adjustment on the third audio signal to obtain a fourth audio signal;
performing dynamic range control on the fourth audio signal to obtain a fifth audio signal;
carrying out amplitude limiting on the fifth audio signal to obtain a sixth audio signal;
and respectively amplifying the first audio signal and the sixth audio signal and then outputting the amplified signals.
Further, the gain of the original audio signal is adjusted through a volume gain controller, so that the second audio signal is obtained.
Further, the middle and high frequency signals in the second audio signal are filtered out through a low-pass filter, so that a third audio signal is obtained.
Further, the electronic equalizer performs equalization adjustment on the third audio signal to obtain a fourth audio signal.
Further, a dynamic range controller is used for performing dynamic range control on the fourth audio signal to obtain the fifth audio signal.
Further, the signal of the fifth audio signal is limited by a limiter, so that a sixth audio signal is obtained.
Further, the first audio signal and the sixth audio signal are respectively received through a first amplifier and a second amplifier; the first amplifier and the second amplifier respectively output a seventh audio signal and an eighth audio signal.
A loudspeaker system comprises a sound source input, a multi-channel independently controlled digital signal processor and a power amplifier, and also comprises a first loudspeaker unit, a second loudspeaker unit and a box body for mounting the first loudspeaker unit and the second loudspeaker unit; when the digital signal processor executes the preset program processing, the steps of the method are realized, and the first loudspeaker unit and the second loudspeaker unit respectively receive two audio signals which are respectively output after the first audio signal and the sixth audio signal are respectively amplified.
Further, the first speaker unit is in phase with or out of phase with the second speaker unit.
Further, the first speaker unit and the second speaker unit share a back cavity.
Compared with the prior art, the audio signal regulation and control method and the loudspeaker system provided by the invention can access an original audio signal, and the original audio signal is input into the post-processing module to be regulated to obtain a first audio signal; adjusting the gain of the original audio signal to obtain a second audio signal; filtering out the medium and high frequency signals in the second audio signal to obtain a third audio signal; carrying out equalization adjustment on the third audio signal to obtain a fourth audio signal; limiting the dynamic range in the fourth audio signal to obtain a fifth audio signal; carrying out amplitude limiting on the fifth audio signal to obtain a sixth audio signal; amplifying the first audio signal and the sixth audio signal respectively and then outputting the amplified signals to obtain audio signals after debugging and optimization; after the first audio signal and the sixth audio signal are respectively amplified, outputting the first audio signal and the sixth audio signal to a corresponding loudspeaker; the audio signal obtained after amplification of the sixth audio signal has the function of controlling the size of the equivalent back cavity volume of the common back cavity of different frequency bands, and the equivalent back cavity volume corresponding to the loudspeaker is changed through adjustment output, so that the output effect of the loudspeaker is improved by using the audio regulation and control method.
Drawings
Fig. 1 is a schematic diagram of the operation of the present invention.
Fig. 2 is a schematic diagram of a speaker system according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of a speaker system according to a second embodiment of the present application.
Fig. 4 is a schematic diagram of a speaker system according to an embodiment of the present application.
Fig. 5 is a fourth schematic diagram of an embodiment of a speaker system according to the present application.
Fig. 6 is a fifth schematic diagram of an embodiment of a speaker system according to the present application.
Fig. 7 is a sixth schematic diagram of an embodiment of a speaker system according to the present application.
Reference numerals shown in the drawings: 1. an original audio signal; 2. a post-processing module; 3. a gain controller; 4. a low-pass filter; 5. an electronic equalizer; 6. a dynamic range controller; 7. an amplitude limiter; 8. a first amplifier; 9. a second amplifier; 10. a first speaker unit; 11. a second speaker unit; 12. a box body; 121. an inner cavity; 122. sealing the front cavity; 1211. a first cavity; 1212. a second cavity; 1213. a third cavity; 1214. a fourth cavity; 1215. a fifth cavity; 1216. a sixth cavity; 1217. a seventh cavity; 1218. an eighth cavity; 1219. a ninth cavity; 12110. a tenth receiving chamber; 123. a partition plate; 124. a first enclosing and blocking part; 125. a second enclosure member; 126. a third surrounding stopper; 127. a fourth fence; 128. and a fifth enclosing member.
Detailed Description
The embodiment provides an audio signal regulation and control method, which is applied to a loudspeaker and comprises the following steps:
an original audio signal 1 is accessed, and the original audio signal 1 is input into a post-processing module 2 to be adjusted to obtain a first audio signal;
adjusting the gain of the original audio signal 1 to obtain a second audio signal; filtering out the medium and high frequency signals in the second audio signal to obtain a third audio signal;
carrying out equalization adjustment on the third audio signal to obtain a fourth audio signal;
performing dynamic range control on the fourth audio signal to obtain a fifth audio signal;
carrying out amplitude limiting on the fifth audio signal to obtain a sixth audio signal;
and respectively amplifying the first audio signal and the sixth audio signal and then outputting the amplified signals.
Through the steps of the method, the first audio signal and the sixth audio signal are respectively amplified and then output, and the audio signal after debugging and optimization is obtained; after the first audio signal and the sixth audio signal are respectively amplified, outputting the first audio signal and the sixth audio signal to a corresponding loudspeaker; the audio signal obtained after amplification of the sixth audio signal has the function of controlling the size of the equivalent back cavity volume of the common back cavity of different frequency bands, and the equivalent back cavity volume corresponding to the loudspeaker is changed through adjustment output, so that the output effect of the loudspeaker is improved by using the audio regulation and control method.
In the present application, the post-processing module 2 is a conventional audio post-processing module.
Preferably, the second audio signal is obtained by adjusting the gain of the original audio signal 1 through a volume gain controller 3.
The gain controller 3, also called GAI N, controls the amplification times of small signals by adjusting the signal voltage, determines the sensitivity and the signal-to-noise ratio, and avoids the problems that the audio signal is too large and is easy to break sound and clip, and the signal-to-noise ratio is too small and low. The original audio signal 1 is adjusted to a suitable signal strength range by a gain controller 3. The gain controller 3 processes the original audio signal 1, and finally amplifies the audio signal output by the sixth audio signal to control the vibration amplitude of the corresponding loudspeaker, so that the degree of compressing and expanding the common back cavity is determined, and the equivalent volume of the common back cavity is further influenced.
Preferably, the gain controller 3 performs gain processing on the original audio signal 1 in a power range of +/-15 dB.
Preferably, the low-pass filter 4 filters out the middle and high frequency signals in the second audio signal to obtain a third audio signal. Because the influence of the volume of the back cavity on the high frequency of the loudspeaker is small, and only the performance of the low frequency part is limited by the volume of the back cavity, the low-pass filter 4 filters the medium-frequency signal and the high-frequency signal in the second audio signal, and finally the audio signal output by the sixth audio signal is amplified to ensure that the corresponding loudspeaker is only used for expanding the volume of the equivalent back cavity, so that the medium-frequency signal and the high-frequency signal are removed, the power consumption is saved, and the temperature of the loudspeaker sound box system applying the method is effectively controlled.
Preferably, the electronic equalizer 5 performs equalization adjustment on the third audio signal to obtain a fourth audio signal.
The electronic equalizer 5, also called EQ, usually adjusts the electronic equalizer 5 to balance the frequency outputs, but the electronic equalizer also causes various side effects such as phase variation.
The electronic equalizer 5 of the present application functions as: and adjusting and processing the output of the third audio signal in different frequency bands, and finally amplifying the audio signal output by the sixth audio signal to determine the output of the corresponding loudspeaker in different frequency bands so as to control the equivalent back cavity volume of different frequency bands, thereby achieving the purpose of low-frequency equalization of the other loudspeaker and simultaneously eliminating the side effect of directly adding the electronic equalizer 5 to the other loudspeaker for outputting sound.
In some embodiments, the electronic equalizer 5 adjusts the third audio signal to within 20-1000 Hz, +/-15 dB.
Preferably, the dynamic range controller 6 is used to perform dynamic range control on the fourth audio signal to obtain the fifth audio signal.
The dynamic range controller 6, also called DRC, can compress the signal with a large dynamic range into a relative average; prevent the sound volume output by the loudspeaker from suddenly changing and being harsh; when the amplitude of the fourth audio signal is relatively moderate, the audio system outputs the fourth audio signal according to the original setting, but when the amplitude of the fourth audio signal is too large, in order to protect the loudspeaker, the dynamic range controller 6 compresses the amplitude of the output signal to limit the amplitude of the output signal within a proper range, and a fifth audio signal is obtained.
Preferably, the amplitude limiter 7 is used to adjust the signal amplitude of the fifth audio signal to avoid signal clipping, so as to obtain a sixth audio signal.
The limiter 7 limits the amplitude of the output signal to a certain range, i.e. when the input voltage exceeds or falls below a certain reference value, the output voltage will be limited to the limiting level and will not change with the input voltage. The fifth audio signal can be shaped, wave-shaped transformed and overvoltage protected for the audio processing circuit by means of a limiter 7.
Preferably, the first audio signal and the sixth audio signal are received by a first amplifier 8 and a second amplifier 9, respectively; the first amplifier 8 and the second amplifier 9 output a seventh audio signal and an eighth audio signal, respectively.
The embodiment provides a loudspeaker system, which comprises a sound source input, a multi-channel independently controlled digital signal processor and a power amplifier, and further comprises a first loudspeaker unit 10, a second loudspeaker unit 11 and a box body 12 for installing the first loudspeaker unit 10 and the second loudspeaker unit 11; when the digital signal processor executes the preset program processing, the steps of the method are implemented, and the first speaker unit 10 and the second speaker unit 11 respectively receive two audio signals which are respectively output after the first audio signal and the sixth audio signal are respectively amplified.
The first speaker unit 10 and the second speaker unit 11 respectively receive two audio signals that are respectively outputted after amplifying the first audio signal and the sixth audio signal, that is: receiving a first audio signal and a sixth audio signal through a first amplifier 8 and a second amplifier 9 respectively; the first amplifier 8 and the second amplifier 9 output a seventh audio signal and an eighth audio signal, respectively, the first speaker unit 10 receives the seventh audio signal, and the second speaker unit 11 receives the eighth audio signal.
The first speaker unit 10 is in phase with or out of phase with the second speaker unit 11.
The first speaker unit 10 and the second speaker unit 11 share a back chamber.
In some embodiments, the first speaker unit 10 and the second speaker unit 11 are connected to the processor in series or in parallel.
In the present system, the gain controller 3 controls the vibration amplitude of the second speaker unit 11, determines the degree of compression and expansion of the common back chamber, and further influences the size of the equivalent volume of the common back chamber.
And filtering the middle and high frequency signals in the second audio signal through a low-pass filter 4 to obtain a third audio signal. Because the influence of the back cavity on the high frequency in the loudspeaker is small, only the performance of the low frequency part is limited by the volume of the back cavity, the low-pass filter 4 filters the medium-high frequency signals in the second audio signals, the eighth audio signal is output to the second loudspeaker unit 11 and is only used for expanding the volume of the equivalent back cavity, so that the medium-high frequency signals are removed, the power consumption is saved, and the temperature of the loudspeaker system is effectively controlled.
The electronic equalizer 5 adjusts and processes the third audio signal, adjusts the output of the second speaker unit 11 at different frequency bands, i.e., the eighth audio signal output to the second speaker unit 11, and determines the output of the second speaker unit 11 at different frequency bands to control the equivalent back cavity volume of different frequency bands, so as to achieve the purpose of low-frequency equalization of the first speaker unit 10, and simultaneously eliminate the side effect of directly adding the electronic equalizer 5 to the first speaker unit 10 outputting sound.
Please refer to fig. 1 and fig. 2; in the first embodiment, by applying the aforementioned audio frequency adjusting and controlling method, the first speaker unit 10 receives the seventh audio signal, the second speaker unit 11 receives the eighth audio signal, the backs of the first speaker unit 10 and the second speaker unit 11 are both disposed in the inner cavity 121 of the box body 12, the vibration ends of the first speaker unit 10 and the second speaker unit 11 are both disposed toward the outer side of the box body 12, the phases of the first speaker unit 10 and the second speaker unit 11 are opposite, a first enclosure part 124 is designed at a position of the box body 12 corresponding to the vibration end of the second speaker unit 11, and the vibration end of the second speaker unit 11 is enclosed, and sealed to form a sealed front cavity 122, which plays a role of preventing the sound wave generated by the vibration of the second speaker unit 11 from propagating outward. The inner cavity 121 is a common back cavity of the first speaker unit 10 and the second speaker unit 11. The shared back cavity volume is synchronously compressed and expanded through the second loudspeaker unit 11, so that the first loudspeaker unit 10 obtains larger equivalent back cavity volume when vibrating, and the low-frequency output effect of the loudspeaker system is enhanced.
The volume of the sealed front cavity 122 and the volume of the shared back cavity are distributed in a proper physical structure, and an eighth audio signal obtained by applying the audio regulation and control method is output to the second loudspeaker unit 11, so that the size of the equivalent back cavity volume of different frequency bands is controlled, the equivalent back cavity volume of the first loudspeaker unit 10 is changed by adjusting the output, and the loudspeaker output effect is improved, therefore, under the condition of the same volume of the box body 12, the loudspeaker system can obtain the equivalent back cavity volume larger than that of the traditional loudspeaker device.
In some embodiments, the first fence 124 is of a removable design, namely: the first enclosing and blocking member 124 is designed to be movable and detachable through a movable sealing cover; the design can realize the switching from the low-frequency enhanced loudspeaker to the loudness enhanced loudspeaker, and is suitable for different use scenes.
The loading and unloading change of the first enclosing and blocking part 124 can be realized by manual operation or the driving of a cylinder controlled by a programmable controller; the post-processing and phase of the input signal of the second speaker unit 11 are changed correspondingly before and after the change, and the function of the second speaker unit 11 is changed from the original space for compressing and expanding into sound wave for outputting.
Please refer to fig. 1 and fig. 3; in the second embodiment, by applying the aforementioned audio adjusting and controlling method, the first speaker unit 10 receives the seventh audio signal, the second speaker unit 11 receives the eighth audio signal, and the partition plate 123 is disposed in the inner cavity 121 of the box 12 to partition the inner cavity 121 into the first cavity 1211 and the second cavity 1212; the back parts of the first speaker unit 10 and the second speaker unit 11 are both disposed in the first cavity 1211, the vibration end of the first speaker unit 10 is disposed toward the outside of the cabinet 12, the vibration end of the second speaker unit 11 is disposed toward the second cavity 1212, the phases of the first speaker unit 10 and the second speaker unit 11 are opposite, and the second cavity 1212 serves as a sealed acoustic front cavity to prevent sound waves from propagating outward. The first cavity 1211 is a common back cavity of the first speaker unit 10 and the second speaker unit 11. The volume of the first cavity 1211 is synchronously compressed and expanded through the second speaker unit 11, so that the first speaker unit 10 obtains a larger equivalent back cavity volume when vibrating, and the low-frequency output effect of the speaker system is enhanced.
Through the allocation of the first cavity 1211 and the second cavity 1212 in a proper physical structure and the seventh audio signal obtained by applying the audio frequency adjusting method, the eighth audio signal is output to the first speaker unit 10 and the second speaker unit 11 respectively, the size of the equivalent back cavity volume of different frequency bands is controlled, the common back cavity volume of the first speaker unit 10 and the second speaker unit 11 is changed by adjusting the output, and the output effect of the speaker is improved, so that under the condition of the same volume of the box body 12, the speaker system can obtain the equivalent back cavity volume larger than that of the conventional speaker device.
In some embodiments, the second speaker unit 11 may be sized and configured differently from the first speaker unit 10, and the second speaker unit 11 may be a bass unit only, since the second speaker unit 11 functions to compress and expand the space to enlarge the equivalent volume of the common back chamber. In order to improve the auxiliary efficiency, a woofer capable of pushing the same or more air volumes at the same power or lower power is generally selected as the second speaker unit 11.
The first loudspeaker unit 10 may be a full frequency unit or a bass unit, or the midrange unit may be adapted to match the woofer by raising the bandwidth lower limit of the midrange loudspeaker by this method.
Please refer to fig. 1 and 4; in the third embodiment, by applying the aforementioned audio conditioning method, the first speaker unit 10 receives the seventh audio signal, the second speaker unit 11 receives the eighth audio signal,
a second enclosing part 125 is arranged in the inner cavity 121 of the box body 12, and divides the inner cavity 121 into a smaller third cavity 1213 and a larger fourth cavity 1214; the vibration ends of the first speaker unit 10 and the second speaker unit 11 face the third cavity 1213, the back of the first speaker unit 10 is disposed outside the cabinet 12, and the back of the second speaker unit 11 is disposed in the fourth cavity 1214. The first speaker unit 10 and the second speaker unit 11 are disposed in opposite phases, the third cavity 1213 is a common back cavity, and the fourth cavity 1214 functions as a sealed front cavity. The volume of the third cavity 1213 is synchronously compressed and expanded by the second speaker unit 11, so that the first speaker unit 10 obtains a larger equivalent back cavity volume when vibrating, and the low-frequency output effect of the speaker system is enhanced.
In some embodiments, the vibrating ends of the first speaker unit 10 and the second speaker unit 11 are opposite in direction, and the central axes of the first speaker unit 10 and the second speaker unit 11 are substantially coincident.
In this embodiment, the seventh audio signal and the eighth audio signal obtained by applying the audio frequency adjusting and controlling method are output to the first speaker unit 10 and the second speaker unit 11, respectively, to control the sizes of the equivalent back cavity volumes of different frequency bands, and the common back cavity volumes of the first speaker unit 10 and the second speaker unit 11 are changed by adjusting and outputting, so that the output effect of the speaker is improved, and therefore, under the condition of the same volume of the cabinet 12, the speaker system can obtain an equivalent back cavity volume larger than that of a conventional speaker device.
In the third embodiment, the volume of the fourth cavity 1214 should be increased to the maximum, and the volume of the common back cavity of the third cavity 1213 should be reduced, so that the first speaker unit 10 radiates sound waves from the back surface, and is mainly used for bass radiation.
Please refer to fig. 1 and 5; in the fourth embodiment, by applying the aforementioned audio conditioning method, the first speaker unit 10 receives the seventh audio signal, the second speaker unit 11 receives the eighth audio signal,
a third baffle 126 is disposed in the inner cavity 121 of the box 12 to divide the inner cavity 121 into a smaller fifth cavity 1215 and a larger sixth cavity 1216; the vibrating end of the first speaker unit 10 faces the fifth cavity 1215, the second speaker unit 11 is disposed in the fifth cavity 1215, the vibrating ends of the second speaker unit 11 face the sixth cavity 1216, and the back of the first speaker unit 10 is disposed outside the cabinet 12. The first speaker unit 10 and the second speaker unit 11 are arranged in phase, the fifth cavity 1215 is a common back cavity, and the fourth cavity 1214 serves to seal the front cavity. The volume of the fifth cavity 1215 is synchronously compressed and expanded by the second speaker unit 11, so that the first speaker unit 10 obtains larger equivalent back cavity volume when vibrating, and the low-frequency output effect of the speaker device is enhanced.
In this embodiment, the seventh audio signal and the eighth audio signal obtained by applying the audio frequency adjusting and controlling method are output to the first speaker unit 10 and the second speaker unit 11, respectively, to control the sizes of the equivalent back cavity volumes of different frequency bands, and the common back cavity volumes of the first speaker unit 10 and the second speaker unit 11 are changed by adjusting and outputting, so that the output effect of the speaker is improved, and therefore, under the condition of the same volume of the cabinet 12, the speaker system can obtain an equivalent back cavity volume larger than that of a conventional speaker device.
Please refer to fig. 1 and fig. 6; in the fifth embodiment, applying the aforementioned audio conditioning method, the first speaker unit 10 receives the seventh audio signal, the second speaker unit 11 receives the eighth audio signal,
a fourth surrounding baffle 127 is arranged in the inner cavity 121 of the box body 12 to divide the inner cavity 121 into a smaller seventh cavity 1217 and a larger eighth cavity 1218; the back of the first speaker unit 10 is disposed in the seventh cavity 1217, and the vibration ends of the first speaker unit 10 face the outside of the cabinet 12; the second speaker unit 11 is disposed in the eighth cavity 1218, and the vibration end faces the seventh cavity 1217. The phases of the first speaker unit 10 and the second speaker unit 11 are arranged in phase, the seventh cavity 1217 is a common back cavity, and the eighth cavity 1218 functions as a front seal cavity. The volume of the seventh cavity 1217 is synchronously compressed and expanded by the second speaker unit 11, so that the first speaker unit 10 obtains a larger equivalent back cavity volume when vibrating, and the low-frequency output effect of the speaker system is enhanced.
In this embodiment, the seventh audio signal and the eighth audio signal obtained by applying the audio frequency adjusting and controlling method are output to the first speaker unit 10 and the second speaker unit 11, respectively, to control the sizes of the equivalent back cavity volumes of different frequency bands, and the common back cavity volumes of the first speaker unit 10 and the second speaker unit 11 are changed by adjusting and outputting, so that the output effect of the speaker is improved, and therefore, under the condition of the same volume of the cabinet 12, the speaker system can obtain an equivalent back cavity volume larger than that of a conventional speaker device.
Preferably, in the second to fifth embodiments, since the first cavity 1211, the second cavity 1212, the third cavity 1213, the fourth cavity 1214, the fifth cavity 1215, the sixth cavity 1216, the seventh cavity 1217 and the eighth cavity 1218 are all closed spaces, in order to avoid that the initial balance position of the suspension system of the speaker unit is affected by the difference between the internal pressure and the external pressure due to the change of the external atmospheric pressure, an air pressure balance passage with a larger acoustic resistance may be selected to be made in each space away from the position of the speaker unit to communicate with the outside.
Preferably, in the second embodiment and the third embodiment, the back of the first speaker unit 10 radiates sound waves outward toward the external space, and the middle-high frequency performance will be weakened, and this design is mainly used as a woofer design. If the full range speaker is desired, the mid-high range speaker unit may be mounted at another location on the cabinet 12, the mid-high range speaker unit may be mounted on the back of the first speaker unit 10 and used together with the common back cavity, or the mid-high range speaker unit may be selected to share a magnetic circuit with the first speaker unit 10, i.e., share the same magnetic gap or use different magnetic gaps on the same magnetic circuit.
Please refer to fig. 1 and 7; sixth embodiment, applying the aforementioned audio conditioning method, the first speaker unit 10 receives the seventh audio signal, the second speaker unit 11 receives the eighth audio signal,
a fifth surrounding baffle 128 is arranged in the inner cavity 121 of the box body 12, and divides the inner cavity 121 into a smaller ninth cavity 1219 and a larger tenth cavity 12110;
the first speaker unit 10 and the second speaker unit 11 are both disposed in the ninth cavity 1219, and the directions of the vibration ends of the first speaker unit and the second speaker unit are substantially opposite, and the tail ends of the first speaker unit and the second speaker unit are disposed adjacently; the vibration ends of the first loudspeaker units 10 face the outside of the cabinet 12; the vibrating end of the second speaker unit 11 faces the tenth receiving chamber 12110. The first speaker unit 10 and the second speaker unit 11 are disposed in opposite phases, the ninth cavity 1219 is a common back cavity, and the tenth cavity 12110 functions as a sealed front cavity. The volume of the ninth cavity 1219 is synchronously compressed and expanded by the second speaker unit 11, so that the first speaker unit 10 obtains a larger equivalent back cavity volume when vibrating, and the low-frequency output effect of the speaker system is enhanced.
In this embodiment, the seventh audio signal and the eighth audio signal obtained by applying the audio frequency adjusting and controlling method are output to the first speaker unit 10 and the second speaker unit 11, respectively, to control the sizes of the equivalent back cavity volumes of different frequency bands, and the common back cavity volumes of the first speaker unit 10 and the second speaker unit 11 are changed by adjusting and outputting, so that the output effect of the speaker is improved, and therefore, under the condition of the same volume of the cabinet 12, the speaker system can obtain an equivalent back cavity volume larger than that of a conventional speaker device.
In some embodiments, the compliance and damping of the first and second speaker units 10, 11 may be adjusted to specifically optimize them.
Claims (10)
1. An audio signal conditioning method, applied to a speaker, the method comprising:
the method comprises the steps of accessing an original audio signal, inputting the original audio signal into a post-processing module for adjustment, and obtaining a first audio signal;
adjusting the gain of the original audio signal to obtain a second audio signal; filtering out the medium and high frequency signals in the second audio signal to obtain a third audio signal;
carrying out equalization adjustment on the third audio signal to obtain a fourth audio signal;
performing dynamic range control on the fourth audio signal to obtain a fifth audio signal;
carrying out amplitude limiting on the fifth audio signal to obtain a sixth audio signal;
and respectively amplifying the first audio signal and the sixth audio signal and then outputting the amplified signals.
2. The method as claimed in claim 1, wherein the second audio signal is obtained by adjusting the gain of the original audio signal with a volume gain controller.
3. The method as claimed in claim 1, wherein the third audio signal is obtained by filtering the middle and high frequency signals in the second audio signal with a low pass filter.
4. The method as claimed in claim 1, wherein the equalizing adjustment is performed on the third audio signal by an electronic equalizer to obtain a fourth audio signal.
5. The method as claimed in claim 1, wherein the dynamic range of the fourth audio signal is controlled by a dynamic range controller to obtain the fifth audio signal.
6. The method as claimed in claim 1, wherein the signal of the fifth audio signal is limited by a limiter to obtain a sixth audio signal.
7. The method as claimed in claim 1, wherein the first audio signal and the sixth audio signal are received by a first amplifier and a second amplifier, respectively; the first amplifier and the second amplifier respectively output a seventh audio signal and an eighth audio signal.
8. A loudspeaker system is characterized by comprising a sound source input, a multi-channel independently controlled digital signal processor and a power amplifier, and further comprising a first loudspeaker unit, a second loudspeaker unit and a box body for mounting the first loudspeaker unit and the second loudspeaker unit; the steps of the method according to any one of claims 1 to 7 are implemented when the digital signal processor executes a preset program process, and the first speaker unit and the second speaker unit respectively receive two audio signals that are respectively outputted after the first audio signal and the sixth audio signal are respectively amplified.
9. A loudspeaker system according to claim 8, wherein the first loudspeaker unit is in phase with or out of phase with the second loudspeaker unit.
10. A loudspeaker system according to claim 8, wherein the first loudspeaker unit shares a back chamber with the second loudspeaker unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101588527A (en) * | 2008-05-23 | 2009-11-25 | 宏碁股份有限公司 | Portable electronic device, sound source processing device and sound source processing method |
| CN103533270A (en) * | 2013-09-27 | 2014-01-22 | 青岛海信电器股份有限公司 | Audio playing equipment and video control method |
| CN106060710A (en) * | 2016-06-08 | 2016-10-26 | 维沃移动通信有限公司 | Audio output method and electronic equipment |
| CN113810800A (en) * | 2021-09-16 | 2021-12-17 | 维沃移动通信有限公司 | Loudspeaker module, sound adjusting method and device thereof and electronic equipment |
| CN114339533A (en) * | 2022-01-13 | 2022-04-12 | 张鹏锋 | Loudspeaker device and system for improving low-frequency output |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588527A (en) * | 2008-05-23 | 2009-11-25 | 宏碁股份有限公司 | Portable electronic device, sound source processing device and sound source processing method |
| CN103533270A (en) * | 2013-09-27 | 2014-01-22 | 青岛海信电器股份有限公司 | Audio playing equipment and video control method |
| CN106060710A (en) * | 2016-06-08 | 2016-10-26 | 维沃移动通信有限公司 | Audio output method and electronic equipment |
| CN113810800A (en) * | 2021-09-16 | 2021-12-17 | 维沃移动通信有限公司 | Loudspeaker module, sound adjusting method and device thereof and electronic equipment |
| CN114339533A (en) * | 2022-01-13 | 2022-04-12 | 张鹏锋 | Loudspeaker device and system for improving low-frequency output |
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