Acoustic response measurement system and method

Abstract

The embodiment of the invention discloses an acoustic response measurement system and method. The system comprises a TWS earphone, an artificial ear module and an acquisition board; the TWS earphone comprises an ADC and a DAC, the ADC is used for collecting sound signals in the environment, and the DAC is used for playing audio data of the TWS earphone; two contacts of the TWS earphone are connected with the acquisition board in a fly line mode, and sound signals in an environment acquired by an ADC of the TWS earphone and audio data played by a DAC are transmitted to the acquisition board through a digital audio interface in a wired mode; the artificial ear module is used for converting sound signals heard by human ears into electric signals; the acquisition board comprises an ADC, is connected with the artificial ear module and is used for acquiring artificial ear data; the acquisition board comprises a clock recovery circuit which is used for recovering a clock signal from the data received by the TWS earphone for the ADC of the acquisition board to use. According to the embodiment of the invention, the problems that the ADC / DAC in the TWS earphone in a wireless measurement mode and the ADC time delay of the acquisition board cannot be accurately obtained and the acoustic characteristics in the earphone are changed by dismounting a shell lead in a wired measurement mode can be solved.

Description

technical field [0001] The invention relates to the field of acoustic response measurement, in particular to an acoustic response measurement system and method. Background technique [0002] Active noise reduction is generally divided into feedforward active noise reduction (Feedforward ANC), feedback active noise reduction (Feedback ANC) and hybrid active noise reduction (Hybrid ANC), each type of active noise reduction can be divided into adaptive active noise reduction and non-adaptive noise reduction Adaptive Active Noise Cancellation. For non-adaptive feed-forward active noise reduction, the noise in the environment is collected through an external MIC. The collected environmental noise passes through a feed-forward filter to generate a signal with the same amplitude and opposite phase, and then plays it through the speaker of the earphone. The sound waves played out cancel out the noise in the environment, so as to achieve the effect of noise reduction. Designing a f...

AI Technical Summary

Problems solved by technology

For this reason, the present invention proposes an acoustic response measurement system, which can solve the problem that the delay of the ADC / DAC inside the wireless measurement TWS earphone and the ADC of the acquisition board cannot be accurately obtained, and the wired measurement mode removes the case and leads to change the internal acoustic characteristics of the earphone.

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