CN108495237A - A kind of amplitude gain control method of loudspeaker tonequality equilibrium - Google Patents
A kind of amplitude gain control method of loudspeaker tonequality equilibrium Download PDFInfo
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- CN108495237A CN108495237A CN201810455615.1A CN201810455615A CN108495237A CN 108495237 A CN108495237 A CN 108495237A CN 201810455615 A CN201810455615 A CN 201810455615A CN 108495237 A CN108495237 A CN 108495237A
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- speaker system
- amplitude
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- equilibrium
- voice unit
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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
-
- 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)
- Circuit For Audible Band Transducer (AREA)
Abstract
A kind of amplitude gain control method of loudspeaker tonequality equilibrium treatment of the present invention carries out amplitude gain control for the speaker system after digital filter carries out sound quality equilibrium treatment is used, and loudspeaker unit especially voice unit is avoided to generate overload.Equilibrium treatment use include two kinds of filter form speaker systems of IIR (infinite-duration impulse response) and FIR (finite impulse response) system respond equilibrium treatment is carried out to it, may make the amplitude-frequency response of speaker system to achieve the purpose that linear characteristic.After equilibrium; the working gain level of speaker system voice unit can be higher than before balanced, and therefore, the present invention is according to the difference of the effective power of the speaker system voice unit before and after equilibrium; decay to the input gain of speaker system, with the speaker system voice unit of protection.It includes speaker system used in the various occasions such as household, HIFI use, profession performance and KTV that the present invention, which can be used in,.
Description
【Technical field】
The present invention relates to a kind of amplitude gain control methods of loudspeaker tonequality equilibrium.
【Background technology】
The last one link of speaker system as electroacoustics system, when due to electroacoustic transduction, between vibrating diaphragm and air
The reasons such as acoustic impedance ratio, babinet, multiple loudspeaker units while the design of sounding and loudspeaker enclosure divider, there is larger sound quality to lack
It falls into.Index in primary evaluation speaker system：Effective frequency range and amplitude-frequency response curve in the frequency range,
A major embodiment of the sound quality defect on the amplitude-frequency response curve of speaker system is characterized in having on curve a large amount of
Peak valley.Therefore the embodiment to the sound quality equilibrium of speaker system in its characteristic is mainly in the straight of amplitude-frequency response curve
Change.
By improving body structure and replacing the loudspeaker unit of higher quality, loud speaker system can be being reduced to a certain degree
The peak valley amplitude for the amplitude-frequency response curve united in its effective frequency range, improves the sound quality defect of speaker system, but
Start with from these two aspects, to a certain extent when, to continue improve sound quality, it is more difficult to realize and cost performance it is low.
With the development of Digital Signal Processing, according to the effective frequency range of speaker system and loud speaker can be combined
Unit divides characteristic, balanced speaker system sound quality, the i.e. peak to the amplitude-frequency response curve in its effective frequency range
Paddy carries out " peak clipping mend paddy ", using including two kinds of filter forms of IIR (infinite-duration impulse response) and FIR (finite impulse response),
" peak " of amplitude-frequency response decay accordingly and promote " paddy " of amplitude-frequency response accordingly, using raising
Frequency response curve of the sound device system in its effective frequency range is straight.
Since before equilibrium, often there is decaying in speaker system in the operating frequency range of its voice unit, it is assumed that
Effective power is RMS at this timeh；After equalization, the frequency response gain in the operating frequency range of voice unit typically results in
It is promoted, effective power is i.e. RMS ' at this timeh(unit dB).Therefore, under normal circumstances, RMS '-RMSh=Δ G>0.
In conclusion after using IIR and FIR to the carry out equilibrium treatment of speaker system, if not to signal amplitude
It is controlled, the higher gain level after equilibrium may be made to generate overload even damage voice unit.
【Invention content】
Technical problem to be solved by the present invention lies in providing a kind of amplitude gain control method of loudspeaker tonequality equilibrium,
The amplitude gain control for realizing speaker system equilibrium, protects high frequency unit not generate overload and damage.
The invention is realized in this way：
A kind of amplitude gain control method of loudspeaker tonequality equilibrium treatment, it is characterised in that：Include the following steps：
The first step：By to need sound quality optimize speaker system carry out electroacoustical measurement, obtain its impulse response h (n) and
Transmission response H (z)；
Second step：According to its impulse response and transmission response, the phase-frequency response and amplitude frequency of speaker system are analyzed
Rate responds, and calculates the effective power RMS in the operating frequency range of voice unith；
Third walks：" paddy is mended in peak clipping " is carried out to the peak valley of the amplitude-frequency response curve in its effective frequency range, is adopted
With including two kinds of filter forms of infinite-duration impulse response IIR and finite impulse response FIR, " peak " of amplitude-frequency response is carried out
It is corresponding to decay and " paddy " of amplitude-frequency response is promoted accordingly, using speaker system in its effective frequency range
Interior frequency response curve is straight；
4th step：The transmission response of the balanced rear speaker system of analysis is H ' (z), and calculates loud speaker voice unit at this time
Effective power RMS ' in its operating frequency rangeh；
5th step：Adjust the input gain Δ G of speaker system so that RMS 'h+ΔG≤RMSh。
The advantage of the invention is that：1, the present invention is divided by the system response obtained to the actual measurement of speaker system
Analysis, then equilibrium treatment is done to speaker system, it may make the amplitude-frequency response of speaker system to achieve the purpose that linear characteristic.
2, the present invention be handled in the input terminal with the mating power amplifier of speaker system, therefore by speaker system carry out characteristic
Analysis, so that it may handle its required filter parameter to obtain, preferable acoustical quality can be obtained.3, to equalization filter
Amplitude gain is adjusted, and can protect loudspeaker unit.4, general dsp hardware circuit or dedicated integrated electricity can be used in the present invention
It realizes on road.5, it includes loud speaker used in the various occasions such as household, HIFI use, profession performance and KTV that the present invention, which can be used in,
System.
【Description of the drawings】
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is principle of the invention block diagram (passive loudspeaker systems).
Fig. 2 is principle of the invention block diagram (active loudspeaker system).
Fig. 3 is the Digital Signal Processing flow chart of the present invention.
【Specific implementation mode】
Shown in please referring to Fig.1 to Fig.3, a kind of amplitude gain control method of loudspeaker tonequality equilibrium includes the following steps：
The first step：By to need sound quality optimize speaker system carry out electroacoustical measurement, obtain its impulse response h (n) and
Transmission response H (z)；
Second step：According to its impulse response and transmission response, the phase-frequency response and amplitude frequency of speaker system are analyzed
Rate responds, and calculates the effective power RMS in the operating frequency range of voice unith(unit dB)；
Third walks：Characteristic is divided according to the effective frequency range of speaker system and speaker unit incorporated therein, equilibrium is raised one's voice
Device system sound quality carries out " paddy is mended in peak clipping " to the peak valley of the amplitude-frequency response curve in its effective frequency range, uses
Including two kinds of filter forms of IIR (infinite-duration impulse response) and FIR (finite impulse response), to " peak " of amplitude-frequency response into
Row is corresponding to decay and is promoted accordingly to " paddy " of amplitude-frequency response, using speaker system in its effective frequency model
Frequency response curve in enclosing is straight；
4th step：The transmission response of the balanced rear speaker system of analysis is H ' (z), and calculates loud speaker voice unit at this time
Effective power RMS ' in its operating frequency rangeh(unit dB)；
5th step：Adjust the input gain Δ G of speaker system so that RMS 'h+ΔG≤RMSh, it is ensured that raising after balanced
The voice unit effective power of sound device system is less than or waits former effective power, with protect voice unit will not because level is excessively high and
It is burned out.
The present invention is analyzed by the system response obtained to the actual measurement of speaker system, then is done to speaker system
Weighing apparatus processing, may make the amplitude-frequency response of speaker system to achieve the purpose that linear characteristic.With the mating work(of speaker system
The input terminal put is handled, therefore by carrying out specificity analysis to speaker system, so that it may which to obtain processing, its is required
Preferable acoustical quality can be obtained in filter parameter.The amplitude gain of equalization filter is adjusted, loud speaker list can be protected
Member will not be burned out because level is excessively high.
General dsp hardware circuit can be used in the present invention or dedicated integrated circuit is realized, Analogical Electronics can also be used
It realizes.It includes speaker system used in the various occasions such as household, HIFI use, profession performance and KTV that the present invention, which can be used in,.
The foregoing is merely the preferable implementation use-cases of the present invention, are not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement and improvement etc., should be included in the present invention's made by
Within protection domain.
Claims (1)
1. a kind of amplitude gain control method of loudspeaker tonequality equilibrium, it is characterised in that：Include the following steps：
The first step：By carrying out electroacoustical measurement to the speaker system for needing sound quality to optimize, its impulse response h (n) and transmission are obtained
Respond H (z)；
Second step：According to its impulse response and transmission response, the phase-frequency response and amplitude-frequency of analyzing speaker system are rung
It answers, and calculates the effective power RMS in the operating frequency range of voice unith；
Third walks：" paddy is mended in peak clipping " is carried out to the peak valley of the amplitude-frequency response curve in its effective frequency range, using packet
Two kinds of filter forms of infinite-duration impulse response IIR and finite impulse response FIR are included, " peak " of amplitude-frequency response are carried out corresponding
Decaying and " paddy " of amplitude-frequency response is promoted accordingly, using speaker system in its effective frequency range
Frequency response curve is straight；
4th step：The transmission response of the balanced rear speaker system of analysis is H ' (z), and calculate at this time loud speaker voice unit at it
Effective power RMS ' in operating frequency rangeh；
5th step：Adjust the input gain Δ G of speaker system so that RMS 'h+ΔG≤RMSh。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810455615.1A CN108495237A (en) | 2018-05-14 | 2018-05-14 | A kind of amplitude gain control method of loudspeaker tonequality equilibrium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810455615.1A CN108495237A (en) | 2018-05-14 | 2018-05-14 | A kind of amplitude gain control method of loudspeaker tonequality equilibrium |
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| Publication Number | Publication Date |
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| CN108495237A true CN108495237A (en) | 2018-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810455615.1A Pending CN108495237A (en) | 2018-05-14 | 2018-05-14 | A kind of amplitude gain control method of loudspeaker tonequality equilibrium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111741406A (en) * | 2020-06-12 | 2020-10-02 | 瑞声科技(新加坡)有限公司 | Audio signal adjusting method and device, computer equipment and storage medium |
-
2018
- 2018-05-14 CN CN201810455615.1A patent/CN108495237A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111741406A (en) * | 2020-06-12 | 2020-10-02 | 瑞声科技(新加坡)有限公司 | Audio signal adjusting method and device, computer equipment and storage medium |
| CN111741406B (en) * | 2020-06-12 | 2022-03-01 | 瑞声科技(新加坡)有限公司 | Audio signal adjusting method and device, computer equipment and storage medium |
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Application publication date: 20180904 |
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