5 results about "Distortion product" patented technology

The invention relates to the technical field of crossing of medical instruments and artificial intelligence, and provides a hearing threshold detection method based on multi-mode hearing electrophysiological signal fusion. Comprising stimulation frequency otoacoustic emission and auditory brainstem response induced by sweep frequency stimulation sound, distortion product otoacoustic emission induced by dual-tone stimulation and middle ear sound immittance / reflection signals, and a multi-task deep learning model is constructed to perform fusion analysis on the signals. According to the method, accurate quantitative regression prediction of hearing thresholds with any frequency resolution and automatic classification and discrimination of hearing loss properties are synchronously realized, the problems of single evaluation dimension and insufficient complex hearing loss analysis ability in the prior art are effectively solved, the comprehensiveness, accuracy and clinical operation efficiency of objective hearing evaluation are remarkably improved, and the method is suitable for popularization and application. And an innovative system solution is provided for fine diagnosis of the auditory function.

First audio content at a first frequency is output alternately with second audio content at a second frequency different from the first. An audio signal indicating otoacoustic emission is received in response. The first and second audio content may be pure tones, and may be non-overlapping in time separated by gaps less than 100 ms. The second frequency may be 1.15-1.3 times the first. A microphone 330 may receive an input indication distortion product otoacoustic emissions. The audio content may be output by a single loudspeaker 325. The health of the subject’s ear may be determined. Further audio content may be determined and output.

An electronic apparatus is provided. The electronic apparatus includes a speaker, a first microphone, a second microphone, memory storing one or more computer programs, and one or more processors communicatively coupled to the speaker, the first microphone, the second microphone, and the memory, wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, cause the electronic apparatus to control an external speaker to output sound of a first frequency, obtain a first sound signal corresponding to the sound of the first frequency through the first microphone, and obtain a second sound signal including the first sound signal through the second microphone, obtain a first noise cancelling signal based on the first sound signal and the second sound signal, output a second noise cancelling signal in which at least one of a phase or a gain of the first noise cancelling signal is changed and a third sound signal of a second frequency through the speaker, obtain the second sound signal by changing at least one of the phase or the gain, and identify at least one of a target phase or a target gain based on a third frequency component related to distortion product otoacoustic emissions (DPOAE) of the first frequency and the second frequency included in the second sound signal.

A circuit comprises an input, an amplifier circuit, signal amplitude detection apparatus, and a predistorter. The input is configured to receive an input signal. The amplifier circuit is configured to output an amplified signal. The signal amplitude detection apparatus is configured to detect at least a portion of a backward wave which interferes with the amplified signal. The signal amplitude detection apparatus is further configured to generate a signal proportional to an amplitude and / or a power of the at least a portion of the backward wave to obtain a generated signal. The predistorter is configured to modify the input signal based on the generated signal and to provide a modified signal to the amplifier circuit.

In some embodiments, the electronic device includes a speaker, a microphone, a memory, a digital signal processor (DSP), a driver, and a processor. The processor is configured to: obtain a first sound signal by combining a first signal, a second signal, and a first anti-phase signal; extract, from a second sound signal related to the first sound signal, a first DPOAE signal; obtain a third sound signal by combining a fourth signal, a fifth signal, and a second anti-phase signal; extract, from a fourth sound signal related to the third sound signal, a second DPOAE signal; obtain a user hearing profile based on the first and second DPOAE signals; and perform, based on the user hearing profile, at least one of a sound volume change and an equalization (EQ) change of a sound to be output.