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Method for rapidly detecting stimulation frequency otoacoustic emission suppression tuning curve

A tuning curve and otoacoustic emission technology, which is applied in diagnostic recording/measurement, medical science, speech analysis, etc., can solve the problems of low detection efficiency, low detection frequency resolution, slow detection speed of suppression tuning curve, etc., to improve accuracy Accuracy, high test efficiency, and the effect of improving test efficiency

Pending Publication Date: 2022-03-04
TSINGHUA UNIV +1
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Problems solved by technology

[0006] In order to solve the shortcomings of the existing SFOAE suppression tuning curve detection speed, low detection efficiency and low detection frequency resolution, the present invention provides a rapid detection method for stimulation frequency otoacoustic emission suppression tuning curve, which can effectively improve detection efficiency and improve Detection frequency resolution to ensure accuracy

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  • Method for rapidly detecting stimulation frequency otoacoustic emission suppression tuning curve
  • Method for rapidly detecting stimulation frequency otoacoustic emission suppression tuning curve
  • Method for rapidly detecting stimulation frequency otoacoustic emission suppression tuning curve

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Embodiment Construction

[0023] A method for rapidly detecting a stimulation frequency otoacoustic emission suppression tuning curve, the specific steps of which are as follows:

[0024] Step 1: Synthesize the stimulus pure tone P(t) and the inhibitory sweep tone S(t) with fixed intensity, and the intensity is denoted as L respectively p and L s , the unit is dBSPL, and the signal expression of the stimulus P(t) is formula (1):

[0025] P(t)=A p cos(2πf p t)

[0026] where f p is the frequency of the pure tone, A p is according to the pure tone intensity L p The converted peak value; the signal expression of suppressed sound S(t) is formula (2):

[0027]

[0028] where A s (t) is based on the fixed sweep tone intensity L s scaled peak value over time, is the instantaneous phase of the swept frequency signal, and the transformation of the phase corresponds to the instantaneous logarithmic change of the signal frequency,

[0029] Step 2: Apply and collect the test sound signal based on th...

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Abstract

The invention relates to the technical field of otoacoustic emission, in particular to a stimulation frequency otoacoustic emission suppression tuning curve rapid detection method, which can effectively improve the detection efficiency, improve the detection frequency resolution and ensure the accuracy, and utilizes a dual-tone suppression algorithm to synthesize pure tones and sweep frequency tones with certain intensity as stimulation sound and suppression sound respectively. The SFOAE signals are applied to a test ear through two paths of miniature loudspeakers, the miniature microphone is used for collecting the induced SFOAE signals suppressed by different degrees, the collection process is repeated under different suppression sound intensities so as to obtain a group of SFOAE intensity spectrums reflecting suppression sound suppression effects of different frequencies and intensities, and for each suppression sound frequency, the SFOAE intensity spectrums can reflect the suppression sound suppression effects of different frequencies and intensities. And respectively taking out SFOAE intensity discrete points under different suppression sound intensities in the SFOAE intensity spectrum, carrying out cubic interpolation fitting, extracting intersection points of a fitting curve and a suppression criterion straight line, and arranging the intersection points under all suppression frequencies together to obtain a suppression tuning curve of the SFOAE.

Description

technical field [0001] The invention relates to the technical field of otoacoustic emission, in particular to a method for quickly detecting a stimulation frequency otoacoustic emission suppression tuning curve. Background technique [0002] The frequency selectivity of the auditory system refers to the ability of the biological auditory system to filter and distinguish certain stimulus frequency components. Otoacoustic emission is a weak sound signal produced by the active mechanism of the cochlea of ​​the inner ear, conducted through the middle ear, and released to the external auditory canal, which can be captured by a high-sensitivity microphone. Otoacoustic emission signals can be divided into spontaneous otoacoustic emissions and evoked otoacoustic emissions according to the cause of their generation, and evoked otoacoustic emissions can be divided into distortion product otoacoustic emissions, transient evoked otoacoustic emissions and stimulus otoacoustic emissions a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/12A61B5/00G10L21/0232G10L21/0316
CPCA61B5/123A61B5/7203G10L21/0232G10L21/0316
Inventor 宫琴许润逸
Owner TSINGHUA UNIV
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