JPS5924011Y2 - glasses hearing aid - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a spectacle-type hearing aid, and more specifically, to a spectacle-type hearing aid with improved sound collection directionality.

Hearing aids are used to compensate for hearing loss, and include earplug-type, behind-the-ear type, and even glasses-type.

This hearing aid is equipped with a directional microphone so that the user can strongly sense sound sources facing the user.

However, since hearing aids are portable, such as in a pocket, they are compact, and microphones are particularly small.

For example, the microphone of a spectacle-type hearing aid is particularly small because it is housed in a space formed within a temple frame.

Therefore, even if a directional microphone is used, the distance between the acoustic terminals is extremely short, and almost no directivity in sound collection can be expected.

Therefore, this idea was developed to provide sufficient directivity even with a small microphone, allowing hearing aid users to clearly hear the opposing sound source without being interfered with by other sound sources. Along one side of the temple frame, a plurality of small holes, in other words, acoustic terminals, are provided that communicate with the internal space of the temple frame, and for sound sources other than the facing sound source, the sound waves from each acoustic terminal to the microphone are It is characterized by using the difference in phase to attenuate the sound waves and reduce the output of the microphone, thereby improving directivity.

The details of this invention will be explained below with reference to the attached drawings.

First, in the figure, reference numeral 1 indicates a lens frame, and temple frames 2 are hinged to both ends of the lens frame 1 to constitute an eyeglass frame, and at least one of the temple frames is hollow. A directional microphone 22 is housed in the inner space 21 near the ear hook part.
The sound collection surface of No. 2 faces the lens frame 1 side.

On the outside of this temple frame 2, in front of the microphone 22, a plurality of small holes 23 are bored at regular intervals, and the internal space 21 is opened by these small holes 23, and these small holes are It is a terminal.

Next, the state of use of the spectacle-type hearing aid according to this invention will be explained.

The user wears it on his face like glasses, and when the user's face faces the sound source, the directional microphone 22 housed in the internal space 21 of the temple frame 2 will inevitably face the sound source.

Therefore, by arranging the small holes 23, which are acoustic terminals, in a line facing the sound source, the phase of the sound waves from the small holes 23 to the diaphragm of the microphone 22 is the same, and in this state, the sound pressure is the highest. will receive.

In this case, the sound waves from a direction not facing the user are
Entering the internal space of the temple frame 2 through each small hole 23,
The sound waves reach the diaphragm of the directional microphone, but the phases of the sound waves reaching the diaphragm from each small hole 23 are different and are reduced as a synthetic liquid, resulting in a sound pressure that is lower than that of the facing sound source. , the user can clearly hear only the sound from the facing sound source.

In the above embodiments, the small holes 23 as acoustic terminals were drilled on the outside of the temple frame 2, but as shown in FIG. Good too.

As is clear from the above explanation, according to the spectacle-type hearing aid of this invention, the internal space formed in the temple frame is opened to the outside through a plurality of small holes that serve as acoustic terminals drilled in front of the microphone. The sound waves from the sound source facing the user have the same phase from each small hole to the directional microphone, so they become a synthetic liquid, and the sound waves from other directions have different phases, so the synthetic liquid is reduced. Only the sound of the face-to-face sound source, or more specifically, only the voice of the interlocutor, can be heard clearly.

[Brief explanation of drawings]

The attached drawings show an embodiment of the spectacle-type hearing aid according to this invention, in which Fig. 1 is a perspective view, Fig. 2 is an enlarged sectional view taken along line II-II in Fig. 1, and Fig. 3 is a perspective view of another embodiment. It is. 1... Lens frame, 2... Temple frame, 21... Internal space, 22...
...Directional microphone, 23...small hole.

Claims (1)

[Scope of utility model registration request] In a spectacle-type hearing aid configured by accommodating a directional microphone deep within the internal space formed in the temple frame, a small hole as an acoustic terminal leading to the internal space is provided on one side along the length of the temple frame. A spectacle-type hearing aid characterized in that a plurality of holes are formed in front of a microphone.