Hearing aid compatible device, mobile terminal and method for realizing hearing aid compatibility

Abstract

The embodiment of the present invention discloses a hearing aid compatible device, comprising an audio codec device, a first inductive coil and a second inductive coil, both ends of the first inductive coil and the second inductive coil are respectively connected to the audio codec The positive output terminal and the negative output terminal of the decoding device are connected to form a corresponding first inductive loop and a second inductive loop, and the first inductive loop includes a switch connected between the first inductive coil and the audio codec device circuit, or, the second inductance loop includes a switch circuit connected between the second inductance coil and the audio codec device; the switch circuit is set so that when the first inductance coil and the second When the directions of the magnetic fields of the inductance coils are different, the direction of the current in the first inductance loop or the second inductance loop is switched. The embodiment of the invention also discloses a hearing aid compatible mobile terminal and a method for the mobile terminal to realize hearing aid compatibility.

Description

technical field [0001] The present invention relates to the communication field, in particular to a hearing aid compatible device, a hearing aid compatible mobile terminal and a method for the mobile terminal to realize hearing aid compatibility. Background technique [0002] In order for people with hearing impairments to use a mobile phone to make calls normally by wearing a hearing aid, the mobile phone is required to have hearing aid compatibility (HAC, Hearing Aid Compatibility). Among them, the audio test (T-coil) in HAC is used to evaluate the strength and signal-to-noise ratio of the audio magnetic field radiated by the wireless terminal equipment, and the requirement of the T-coil is that the magnetic field intensity of the audio magnetic field radiated by the wireless terminal equipment is large and the signal-to-noise ratio is high , so that the hearing aid can couple to a clear audio signal during a call. [0003] At present, related schemes to realize the T-coi...

AI Technical Summary

Problems solved by technology

In the first solution, the cost of the HAC receiver is higher than that of the non-HAC receiver, and if a customized HAC receiver is used, the cost will be higher

In the second scheme, the overall cost of the scheme using HAC inductance coil plus non-HAC receiver is lower than that of the scheme using HAC receiver. However, since the non-HAC receiver also has an inductance coil inside, the inductance coil of the non-HAC receiver is working The magnetic field will also be radiated outward, because the direction of the inductance coil in different types of receivers and the direction of the HAC inductance patch are different, the inductance coil of the non-HAC receiver may overlap with the magnetic field generated by the HAC inductance coil, or may be When the patch direction of the HAC inductor does not match the direction of the inductor coil of the non-HAC receiver, the magnetic field generated by the HAC inductor coil and the magnetic field generated by the receiver inductor coil will reversely cancel each other out, and the T-coil index will be serious. deterioration

However, whether the patch direction of the HAC inductor matches the direction of the inductor coil of the non-HAC receiver cannot be detected in the production line, which may easily cause the HAC to fail to meet the requirements.

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