Adjustable earmuff type sound field audiometry device

Abstract

The invention discloses an adjustable earmuff type sound field audiometry device, wherein a sound insulation cavity is applied between an ear and an earphone to establish an adjustable closed sound insulation space. The insulation piece is in close contact with the skin around the ear, a test earphone is arranged in the space inside the sound insulation shell, an adjusting mechanism is arranged between the insulation piece and the sound insulation shell, the adjusting mechanism includes the sound insulation cavity, a regulator and a metal shrapnel, the sound insulation cavity is a hallow structure, the metal shrapnel is arranged in the sound insulation cavity and is in close contact with the inner wall of the sound insulation cavity; one end of the regulator suns through the sound insulation cavity and is matched with the metal shrapnel. By controlling the regulator, the metal shrapnel can be controlled to contract or extend in the cavity, so that the volume of the sound insulation cavity can be reduced or larger under the condition that the distance between the earphone and the ear is not changed, and the audiometry device can satisfy tests of different statuses, different items can be tested by using the same device, the defect and the complexity of the traditional sound field audiometry method are improved, and the testing efficiency and the testing accuracy are improved.

Description

technical field [0001] The invention relates to a hearing detection device, in particular to an adjustable earmuff type sound field audiometry device. Background technique [0002] There are many behavioral response audiometry items that use sound stimulation in otology, such as: assessment of hearing acuity (pure tone audiometry), speech audiometry, pediatric audiometry, measurement and effect evaluation of hearing aid functional gain, cochlear implant assessment Wait. Some of these projects are performed with headphones, while others require the use of speakers. Usually, earphones can be used for the bare ear test, but sound field audiometry is required for those wearing hearing equipment because the earphones cannot wrap the equipment. The sound field test is to use two speakers in the audiometry room to send out test sound signals, so that the test sound passes through the hearing equipment and then enters the human ear, so as to measure the hearing threshold level aft...

AI Technical Summary

Problems solved by technology

[0003] At present, it is difficult to carry out sound field testing in outpatient clinics. The reasons can be summarized as follows: first, the construction of sound-proof rooms dedicated to sound fields takes up a lot of space and costs are high; second, the cost of devices used for sound field audiometry is high; third, , even if the facilities are complete, due to the cumbersome and troublesome test steps and low accuracy, many times the test is not carried out at all

Among them, the degree of hearing impairment of the subjects has a great impact on the accuracy of the test. In the sound field environment, if the hearing of both ears is close, the measured results reflect both sides, and the hearing threshold of one ear cannot be obtained.

Images