Stimulus frequency otoacoustic emission tuning curve detection and calibration system

Abstract

The invention relates to a stimulus frequency otoacoustic emission (SFOAE) tuning curve detection and calibration system, which comprises a computer, a sound card, an acoustic sensor and a preamplifier. A sound card driving system and a test calibration execution system are arranged in the computer. An acoustic sensor position calibration module in the test calibration execution system is used for calibrating the position of the acoustic sensor. An SFOAE Fine Structure detection module is used for extracting SFOAEs within a target stimulus frequency range, and determining optimal stimulus frequency. An SFOAE I / O function detection module is used for extracting a relationship between frequency otoacoustic emissions and stimulus sounds within a stimulus intensity range at the optimal stimulus frequency, and determining an inhibition rule. An SFOAE turning curve detection module is used for extracting the SFOAEs in line with the inhibition rule at the optimal stimulus frequency, and drawing an SFOAE tuning curve. The SFOAEs can be quantitatively detected and analyzed by extracting characteristic signals of the SFOAEs; and the system can be widely applied to audibility detection.

Description

technical field [0001] The invention relates to an auditory detection and calibration system, in particular to a stimulation frequency otoacoustic emission tuning curve detection and calibration system based on a sound card. Background technique [0002] Stimulus frequency otoacoustic emissions (SFOAEs) are a kind of audio energy with the same nature as pure tone stimulation that is emitted back to the external auditory canal after the cochlea is stimulated by continuous pure tone. Since the frequency of this emitted otoacoustic emission is exactly the same as that of the pure tone stimulus, it is called the stimulus frequency otoacoustic emission. The intensity of the stimulus frequency otoacoustic emissions is very low, usually between -15dB SPL to +20dB SPL, and its frequency selective characteristics at characteristic frequencies can be characterized by the stimulus frequency otoacoustic emissions tuning curve and its Q value. [0003] The stimulation frequency otoacous...

AI Technical Summary

Problems solved by technology

Among them, the OAEs test includes DPOAEs, transient evoked otoacoustic emissions (TEOAEs) and SFOAEs. This patent has many detection functions, but only mentions the stimulation frequency otoacoustic emission, and does not involve the detailed detection process of the stimulation frequency otoacoustic emission and Stimulation frequency otoacoustic emission tuning curve; In addition, this patent does not mention the calibration of the position of the acoustic sensor, and the calibration of the position of the acoustic sensor is more important, too loose or too tight will bring unnecessary noise to the acquired waveform. Noise, which causes time domain and frequency domain interference to the sampling waveform. For example, if the position of the acoustic sensor is too loose, the amplitude of the collected sound pressure will be too small; on the contrary, if the position of the acoustic sensor is too tight, the amplitude of the collected sound pressure will be too large

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