Frequency response adaptive equalization method for audio device

An adaptive equalization and frequency response technology, applied in the direction of frequency response correction, etc., can solve the problems of few frequency points, unsatisfactory effect, difficult frequency response characteristic curve, etc., to achieve the effect of simple and convenient use

Inactive Publication Date: 2008-04-02
张秀丽
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AI Technical Summary

Problems solved by technology

Since the frequency points are pre-set, it cannot follow the changes of the environment, and the number of frequency points is small, it is inconvenient to use in practice, and the effect is not ideal
Although digital parametric equalization can set up to 31 frequency

Method used

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  • Frequency response adaptive equalization method for audio device
  • Frequency response adaptive equalization method for audio device
  • Frequency response adaptive equalization method for audio device

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] With reference to Fig. 1, basic train of thought of the present invention is to set up frequency response self-adaptive equalization module on a digital signal processor (also can be external) of audio equipment, utilize this module to send one group of band-limited white noise test signal sequences, through a After the audio CODEC is converted into an analog band-limited white noise signal, after being processed by a circuit element, it is connected to the input end of the audio equipment under test, and its output is connected to a sound sending device, that is, the speaker emits a sound signal, and the sound receiving device microphone receives the signal. After the sound signal, another circuit element is connected to the audio CODEC to process the signal, and the audio CODEC converts the signal into a digital sequence and sends it b...

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PUM

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Abstract

An audio device frequency response adaptive balancing method is provided in the present invention. To set up a frequency adaptive balancing module on a digital signal processor of the audio device, using the module to emit a set of bandlimited white noise testing signal sequence, through the audio CODEC converting into stimulant signals, after being processed by a circuit element connecting to the input end of the tested audio device, its output end connecting to a voice sending device emitting voice signal, after receiving the voice signal by a voice receiving device, processing the signal again by the other circuit element receiving audio CODEC, and after converting into a digital sequence transferring back to the frequency response adaptive balancing module, changing time domain into frequency domain, detecting the frequency spectrum speciality of the received signal in the frequency domain, if generating peak and valley value during detecting course, then according to the detected frequency response speciality of the detected audio device automatically designing a set of cascading hoist and attenuation digital filter compensating the peak and valley value to the frequency spectrum, leading the frequency spectrum speciality of the detected audio device to be flat.

Description

technical field [0001] The invention relates to a frequency response self-adaptive equalization method of audio equipment, in particular to a method which can be used in any occasion to detect and automatically adjust frequency response characteristics of audio equipment. Background technique [0002] Whether the frequency response characteristics of audio equipment is flat or not directly affects sound quality effects such as timbre and sound field performance, and is one of the most important parameters of audio equipment. If the frequency response characteristics are not flat, and there is a place where a certain frequency sinks, then this frequency band will not be heard clearly; and the prominent frequency band will cover up the weaker frequency band, so both manufacturers and enthusiasts are thinking. Do everything possible to improve the frequency response characteristic curve of audio equipment. But the actual situation is: Even if components of uniform specificatio...

Claims

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Application Information

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IPC IPC(8): H04R3/04
Inventor 张秀丽
Owner 张秀丽
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