Human head model ENC testing device for simulating intracranial mouth-to-ear sound path conduction

Abstract

The invention discloses a human head model ENC testing device for simulating intracranial mouth-to-ear sound path conduction. The human head model ENC testing device comprises a profiling human head and a testing device, the testing device comprises an artificial ear, an artificial mouth, a profiling ear and an intracranial sound conduction assembly, the interior of the profiling head is of a hollow structure, the hollow structure is used for containing the testing device, ear grooves are formed in the left side and the right side of the profiling head, the profiling ear is arranged at the ear grooves, the artificial ear is connected to the middle of the inner side of the profiling ear, and the intracranial sound conduction assembly is connected to the profiling ear and the artificial ear; and a mouth groove is formed in the front side of the profiling head, and the artificial mouth is arranged at the mouth groove. The invention relates to a testing device capable of truly simulating a human body intracranial sound field environment and human head intracranial sound conduction to achieve an ENC effect.

Description

technical field [0001] The invention relates to the field of Bluetooth earphone testing, in particular to a test device capable of truly simulating the human intracranial sound field environment and human head intracranial sound conduction to achieve ENC effects. Background technique [0002] ENC (Environmental Noise Cancellation, environmental noise reduction technology), is a function of headphones to suppress environmental noise through an algorithm, which can effectively suppress 90% of reverse environmental noise, thereby reducing environmental noise by up to 35dB, through a dual microphone array , Accurately calculate the speaking direction of the caller, while protecting the target voice in the main direction, remove various interference noises in the environment, and benefit the other party during the call. Through ENC, the impact of environmental noise on the call can be reduced, allowing the other party to hear pure voice, while making the other end of the call fee...

AI Technical Summary

Problems solved by technology

For the test of the earphone call noise reduction algorithm, the earphone is usually placed on the test fixture that simulates the position of the human ear on both sides of the artificial mouth. Although this type of earphone fixture can complete its work of testing the noise reduction performance of the earphone call, However, it ignores the audio signal transmission from the mouth to the ear canal in the human skull, and does not reflect the effect of the ENC algorithm of the earphones in the real environment.

[0005] The current test fixtures in the field of ENC earphone testing do not have a simulation fixture that can more realistically simulate the sound field environment in the human head. As a result, in the laboratory test stage, some earphones that use the sound conduction in the human head to achieve the ENC effect cannot Test the effect

At the same time, for general ENC noise-cancelling headphones, ordinary test fixtures cannot well represent the algorithm effect of headphones in real environments

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