Frequency response adaptive equalization method for audio device

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...

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 points, it is difficult to obtain a flat frequency response characteristic curve by adjusting the parameters of the parametric equalizer because it is impossible to know the frequency and gain corresponding to the uneven frequency response of the actual audio equipment

Images