CN107172541A - Amplitude reduction method, television terminal and the storage medium of audio amplifier, bass unit - Google Patents
Amplitude reduction method, television terminal and the storage medium of audio amplifier, bass unit Download PDFInfo
- Publication number
- CN107172541A CN107172541A CN201710521233.XA CN201710521233A CN107172541A CN 107172541 A CN107172541 A CN 107172541A CN 201710521233 A CN201710521233 A CN 201710521233A CN 107172541 A CN107172541 A CN 107172541A
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- China
- Prior art keywords
- amplitude
- audio amplifier
- bass unit
- frequency
- bass
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
The present invention discloses a kind of amplitude reduction method of bass unit of audio amplifier, comprises the following steps：According to amplitude frequency response curve, amplitude of the bass unit of the audio amplifier under intended power output is obtained；According to the amplitude, amplitude second largest value frequency is determined；Signal attenuation is carried out using bandstop filter at the amplitude second largest value frequency, to reduce the amplitude of the bass unit.Invention additionally discloses a kind of audio amplifier, television terminal and computer-readable recording medium.The present invention can carry out signal transacting according to the amplitude response of low frequency bass loudspeaker unit in audio amplifier at amplitude second largest value frequency, to reduce the amplitude of the amplitude second largest value frequency, so as to reach the purpose of reduction low-frequency distortion.
Description
Technical field
The present invention relates to technology for loudspeaker box field, more particularly to a kind of audio amplifier, the amplitude reduction method of bass unit, TV are whole
End and computer-readable recording medium.
Background technology
There is distortion phenomenon to prevent audio amplifier especially phase inverted cabinet, existing scheme generally with high-pass filter to less than
The low frequency signal of some frequency is filtered, and is commonly called as undercut, but gradually finds this scheme for some small-sized sounds in practice
Case, its effect is not obvious.And loudspeaker unit, particularly high Q (factor of merit) value list in audio amplifier are found by simulation software
Member, in specific Frequency, the amplitude of vibrating diaphragm can reach larger numerical value by frequency at two, and excessive amplitude will bring mistake
The problems such as true degree rises.
The content of the invention
The main object of the present invention is to provide amplitude reduction method, television terminal and the calculating of a kind of audio amplifier, bass unit
Machine readable storage medium storing program for executing, it is intended to according to the amplitude response of low frequency bass loudspeaker unit in audio amplifier, in amplitude second largest value frequency
Signal transacting is carried out at point, to reduce the amplitude of the amplitude second largest value frequency, so as to reach the purpose of reduction low-frequency distortion.
The present invention provides a kind of amplitude reduction method of bass unit of audio amplifier, the amplitude drop of the bass unit of the audio amplifier
Low method comprises the following steps：
According to amplitude-frequency response curve, amplitude of the bass unit of the audio amplifier under intended power output is obtained；
According to the amplitude, amplitude second largest value frequency is determined；
Signal attenuation is carried out using bandstop filter at the amplitude second largest value frequency, to reduce the bass unit
Amplitude.
Preferably, it is described according to amplitude-frequency response curve, the bass unit of the audio amplifier is obtained in intended power output
Under amplitude the step of after also include：
According to the amplitude, amplitude maximum frequency is determined；
High-pass filter is utilized at the amplitude maximum frequency, the frequency of setting range is cut off, it is corresponding to remove
Amplitude.
Preferably, the bandstop filter is notch filter.
Preferably, the audio amplifier is phase inverted cabinet.
To achieve the above object, the present invention also provides a kind of audio amplifier, and the audio amplifier includes：
Bass unit amplitude reduces program, and the bass unit amplitude reduction program is arranged for carrying out audio amplifier as described above
Bass unit amplitude reduction method the step of.
To achieve the above object, the present invention also provides a kind of television terminal, and the television terminal includes sound as described above
Case.
To achieve the above object, the present invention also provides a kind of computer-readable recording medium, the computer-readable storage
The bass unit amplitude that is stored with medium reduces program, and the bass unit amplitude reduction program is executed by processor realization as above
The step of amplitude reduction method of the bass unit of described audio amplifier.
Audio amplifier that the present invention is provided, bass unit amplitude reduction method, the TV of the built-in audio amplifier and computer can
Storage medium is read, according to amplitude-frequency response curve, amplitude of the bass unit of the audio amplifier under intended power output is obtained
Value, then according to the amplitude, determines amplitude second largest value frequency, bandstop filter is utilized at the amplitude second largest value frequency
Signal attenuation is carried out, to reduce the amplitude of the bass unit.So, can be according to low frequency bass loudspeaker unit in audio amplifier
Amplitude response, carries out signal transacting at amplitude second largest value frequency, to reduce the amplitude of the amplitude second largest value frequency, so that
Reach the purpose of reduction low-frequency distortion.
Brief description of the drawings
Fig. 1 is the television terminal structural representation for the hardware running environment that scheme of the embodiment of the present invention is related to；
Fig. 2 reduces the schematic flow sheet of method first embodiment for the amplitude of the bass unit of audio amplifier of the present invention；
Fig. 3 is amplitude-frequency response curve of the audio amplifier simulation software in the case where power output is 1W；
Fig. 4 is amplitude-frequency response curve of the audio amplifier simulation software in the case where power output is 10W；
Fig. 5 reduces the schematic flow sheet of method second embodiment for the amplitude of the bass unit of audio amplifier of the present invention；
Fig. 6 is the amplitude measured curve that the present invention is not carried out；
Fig. 7 is implementation amplitude measured curve of the invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The television terminal of the present invention, as shown in figure 1, the television terminal includes：Processor 1001, such as CPU, Yong Hujie
Mouth 1002, memory 1003, communication bus 1004.Wherein, communication bus 1004 is used to realize that the connection between these components to be led to
Letter.User interface 1002 can include display screen (Display), input block such as remote control.Memory 1003 can be high
Fast RAM memory or stable memory (non-volatile memory), such as magnetic disk storage.Memory
The 1003 optional storage devices that can also be independently of aforementioned processor 1001.
The television terminal can also include the audio amplifier for being built in the television terminal.
It will be understood by those skilled in the art that the television terminal structure shown in Fig. 1 does not constitute the limit to television terminal
It is fixed, it can include than illustrating more or less parts, either combine some parts or different parts arrangement.
As shown in figure 1, leading to as operating system, network can be included in a kind of memory 1003 of computer-readable storage medium
Believe the amplitude reduction program of the bass unit of module, Subscriber Interface Module SIM and audio amplifier.
In the television terminal shown in Fig. 1, user interface 1002 be mainly used in receive user by touch display screen or
Input block input instruction triggers user instruction, and such as program is played, suspends or stopped, and volume is tuned up or turned down；Processor
1001 are used to call the amplitude of the bass unit of the audio amplifier stored in memory 1003 to reduce program, and perform following operate：
According to amplitude-frequency response curve, amplitude of the bass unit of the audio amplifier under intended power output is obtained；
According to the amplitude, amplitude second largest value frequency is determined；
Signal attenuation is carried out using bandstop filter at the amplitude second largest value frequency, to reduce the bass unit
Amplitude.
Further, processor 1001 can call the amplitude of the bass unit of the audio amplifier stored in memory 1003 to reduce
Program, also performs following operate：
According to the amplitude, amplitude maximum frequency is determined；
High-pass filter is utilized at the amplitude maximum frequency, the frequency of setting range is cut off, it is corresponding to remove
Amplitude.
Further, processor 1001 can call the amplitude of the bass unit of the audio amplifier stored in memory 1003 to reduce
Program, also performs following operate：
The bandstop filter is notch filter.
Further, processor 1001 can call the amplitude of the bass unit of the audio amplifier stored in memory 1003 to reduce
Program, also performs following operate：
The audio amplifier is phase inverted cabinet.
Reference picture 2, in the first embodiment, the present invention provide a kind of amplitude reduction method of bass unit of audio amplifier, bag
Include：
Step S1, according to amplitude-frequency response curve, obtain the bass unit of the audio amplifier under intended power output
Amplitude；
In the present embodiment, enter the limitation of row amplitude mainly for the bass unit of audio amplifier, to reduce loudspeaker amplitude, obtain
Obtain the LF-response of low distortion.In the present embodiment, the audio amplifier is preferably phase inverted cabinet, and the phase inverted cabinet is a kind of sound
Box-shaped formula, it, by the low-frequency sound wave of diaphragm of loudspeaker back side radiant in audio amplifier, is reversed 180 degree by phase and radiated using phase-reversing tube
Out, the low frequency radiated with loudspeaker is superimposed, so as to strengthen low frequency.
In the present embodiment, illustrated exemplified by the LCD TV of such as 55 inches of selection television terminal, reference picture 3 and Fig. 4：
Fig. 3 is amplitude-frequency response curve of the audio amplifier simulation software in the case where power output is predetermined power such as 1W, it is known that,
Amplitude can reach peak value, the i.e. 1. place of Fig. 3 arrows sensing and 2. locate that 1. place is amplitude maximum frequency, is 2. located by frequency at two
For amplitude second largest value frequency；
Fig. 4 is amplitude-frequency response curve of the audio amplifier simulation software in the case where power output is predetermined power such as 10W, it is known that,
Amplitude can reach peak value, the i.e. 3. place of Fig. 3 arrows sensing and 4. locate that 3. place is amplitude maximum frequency, is 4. located by frequency at two
For amplitude second largest value frequency.But the 1.60mm when amplitude that now 4. arrow is located is 1W from power output, has reached output
5.04mm when power is 10W.
The audio amplifier of the television terminal used in the present embodiment, due to the wide bass units of its 35mm, under structure limitation
Amplitude there was only 4mm, if therefore more than limits value, two risks, i.e. bottoming damage and the distortion factor may be brought to increase sharply.
To solve this problem, the present invention program is decayed for the larger frequency of bass unit amplitude, and different from existing
There is the balanced acoustical end frequency response curve used in scheme.
Step S2, according to the amplitude, determine amplitude second largest value frequency；
Step S3, at the amplitude second largest value frequency using bandstop filter carry out signal attenuation, it is described low to reduce
The amplitude of sound unit.
In the present embodiment, the amplitude second largest value problem bigger than normal 4. located for arrow in Fig. 4, the present invention is in amplitude second largest value frequency
Bandstop filter, preferably notch filter nearby are used at point 200Hz, signal specific aim is decayed.For example：Can use-
6dB (decibel)/200Hz/Q (bandwidth)=4, namely in frequency at 200Hz frequencies, to reduce 6dB, Q=4 single-frequency point is declined
Subtract, to reduce the amplitude of the bass unit.Certainly, in other embodiments, other manner can also be used.
The amplitude reduction method of the bass unit for the audio amplifier that the present invention is provided, by according to amplitude-frequency response curve, obtaining
Amplitude of the bass unit of the audio amplifier under intended power output is taken, then according to the amplitude, determines that amplitude time is big
It is worth frequency, signal attenuation is carried out using bandstop filter at the amplitude second largest value frequency, to reduce the bass unit
Amplitude.So, it can be entered according to the amplitude response of low frequency bass loudspeaker unit in audio amplifier at amplitude second largest value frequency
Row signal transacting, to reduce the amplitude of the amplitude second largest value frequency, so as to reach the purpose of reduction low-frequency distortion.
In a second embodiment, reference picture 5, based on first embodiment, also include after the step S1：
Step S3, according to the amplitude, determine amplitude maximum frequency；
Step S4, utilize high-pass filter at the amplitude maximum frequency, the frequency of setting range is cut off, to remove
Corresponding amplitude.
In the present embodiment, the amplitude maximum problem bigger than normal 3. located for Fig. 4 arrows, the present invention uses high-pass filter,
The frequency of setting range is cut off, to remove corresponding amplitude.Specifically, 0~70Hz frequency can be cut off, correspondence
Ground, corresponding all amplitudes are removed, so as to reduce current peak swing.
Illustrated below in conjunction with example, Fig. 6 is the amplitude measured curve that the present invention is not carried out, Fig. 7 is of the invention to implement
Amplitude measured curve, abscissa is frequency, and ordinate is Range Amplitude, with reference to Fig. 6 and Fig. 7, it is known that, 150-210Hz's
In frequency range, implement the amplitude of the present invention from Fig. 6 1.5mm or so, drop to Fig. 7 0.6mm or so.
In addition, the embodiment of the present invention also provides a kind of television terminal and computer-readable recording medium, the TV is whole
End includes the amplitude reduction program of the bass unit of audio amplifier, and the amplitude reduction program of the bass unit of the audio amplifier is arranged for carrying out
The step of amplitude reduction method of the bass unit of audio amplifier as described above.
Be stored with the computer-readable recording medium television terminal audio amplifier bass unit amplitude reduction program,
The amplitude reduction program of the bass unit of the audio amplifier of the television terminal realizes following operation when being executed by processor：
According to amplitude-frequency response curve, amplitude of the bass unit of the audio amplifier under intended power output is obtained；
According to the amplitude, amplitude second largest value frequency is determined；
Signal attenuation is carried out using bandstop filter at the amplitude second largest value frequency, to reduce the bass unit
Amplitude.
Further, reality is gone back when the amplitude reduction program of the bass unit of the audio amplifier of the television terminal is executed by processor
Now following operation：
According to the amplitude, amplitude maximum frequency is determined；
High-pass filter is utilized at the amplitude maximum frequency, the frequency of setting range is cut off, it is corresponding to remove
Amplitude.
Further, reality is gone back when the amplitude reduction program of the bass unit of the audio amplifier of the television terminal is executed by processor
Now following operation：
The bandstop filter is notch filter.
Further, reality is gone back when the amplitude reduction program of the bass unit of the audio amplifier of the television terminal is executed by processor
Now following operation：
The audio amplifier is phase inverted cabinet.
Specific embodiment reference when the amplitude reduction program of the bass unit of the audio amplifier is executed by processor is retouched above
State, here is omitted.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every at this
Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical fields in the scope of patent protection of the present invention.
Claims (7)
1. a kind of amplitude reduction method of bass unit of audio amplifier, it is characterised in that the amplitude drop of the bass unit of the audio amplifier
Low method comprises the following steps：
According to amplitude-frequency response curve, amplitude of the bass unit of the audio amplifier under intended power output is obtained；
According to the amplitude, amplitude second largest value frequency is determined；
Signal attenuation is carried out using bandstop filter at the amplitude second largest value frequency, to reduce shaking for the bass unit
Width.
2. the bass unit of audio amplifier as claimed in claim 1 amplitude reduction method, it is characterised in that it is described according to amplitude-
Also include after frequency response curve, the step of obtaining amplitude of the bass unit of the audio amplifier under intended power output：
According to the amplitude, amplitude maximum frequency is determined；
High-pass filter is utilized at the amplitude maximum frequency, the frequency of setting range is cut off, to remove corresponding amplitude
Value.
3. the amplitude reduction method of the bass unit of audio amplifier as claimed in claim 1, it is characterised in that the bandstop filter
For notch filter.
4. the amplitude reduction method of the bass unit of audio amplifier as claimed in claim 1, it is characterised in that the audio amplifier is paraphase
Formula audio amplifier.
5. a kind of audio amplifier, it is characterised in that the audio amplifier includes：
Bass unit amplitude reduces program, and the bass unit amplitude reduction program is arranged for carrying out as appointed in Claims 1-4
The step of amplitude reduction method of the bass unit of audio amplifier described in one.
6. a kind of television terminal, it is characterised in that the television terminal includes audio amplifier as claimed in claim 5.
7. a kind of computer-readable recording medium, it is characterised in that be stored with bass list on the computer-readable recording medium
First amplitude reduces program, and the bass unit amplitude reduction program is executed by processor realization such as any one of Claims 1-4
The step of amplitude reduction method of the bass unit of described audio amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710521233.XA CN107172541A (en) | 2017-06-29 | 2017-06-29 | Amplitude reduction method, television terminal and the storage medium of audio amplifier, bass unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710521233.XA CN107172541A (en) | 2017-06-29 | 2017-06-29 | Amplitude reduction method, television terminal and the storage medium of audio amplifier, bass unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107172541A true CN107172541A (en) | 2017-09-15 |
Family
ID=59828119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710521233.XA Pending CN107172541A (en) | 2017-06-29 | 2017-06-29 | Amplitude reduction method, television terminal and the storage medium of audio amplifier, bass unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109769175A (en) * | 2019-02-25 | 2019-05-17 | 维沃移动通信有限公司 | A kind of audio-frequency processing method and electronic equipment |
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|---|---|---|---|---|
| CN86203840U (en) * | 1986-05-27 | 1986-12-10 | 王荣栓 | Antiphase-type moving feedback speaker |
| CN101567998A (en) * | 2008-04-25 | 2009-10-28 | 深圳Tcl新技术有限公司 | Method for regulating tone and panel television |
| CN103686555A (en) * | 2013-11-19 | 2014-03-26 | 歌尔声学股份有限公司 | Miniature loudspeaker module group and method for enhancing frequency response of miniature loudspeaker module group, and electronic device |
| CN103686556A (en) * | 2013-11-19 | 2014-03-26 | 歌尔声学股份有限公司 | Miniature loudspeaker module group and method for enhancing frequency response of miniature loudspeaker module group, and electronic device |
| CN106162495A (en) * | 2016-08-03 | 2016-11-23 | 厦门傅里叶电子有限公司 | The method improving Microspeaker performance |
-
2017
- 2017-06-29 CN CN201710521233.XA patent/CN107172541A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86203840U (en) * | 1986-05-27 | 1986-12-10 | 王荣栓 | Antiphase-type moving feedback speaker |
| CN101567998A (en) * | 2008-04-25 | 2009-10-28 | 深圳Tcl新技术有限公司 | Method for regulating tone and panel television |
| CN103686555A (en) * | 2013-11-19 | 2014-03-26 | 歌尔声学股份有限公司 | Miniature loudspeaker module group and method for enhancing frequency response of miniature loudspeaker module group, and electronic device |
| CN103686556A (en) * | 2013-11-19 | 2014-03-26 | 歌尔声学股份有限公司 | Miniature loudspeaker module group and method for enhancing frequency response of miniature loudspeaker module group, and electronic device |
| CN106162495A (en) * | 2016-08-03 | 2016-11-23 | 厦门傅里叶电子有限公司 | The method improving Microspeaker performance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109769175A (en) * | 2019-02-25 | 2019-05-17 | 维沃移动通信有限公司 | A kind of audio-frequency processing method and electronic equipment |
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Application publication date: 20170915 |