CN106028222A - Dual Isolation Noise Canceling Earmuffs - Google Patents

Abstract

The invention provides a double isolation type noise reduction earmuff, which relates to the field of technical audio equipment, and solves the technical problem of improving a noise isolation effect. The earmuff comprises an earmuff shell, an audio noise reduction circuit board and an in-earmuff loudspeaker installed inside the earmuff shell, and an earplug capable of being placed inside the earmuff shell; an audio port of the in-earmuff loudspeaker is connected to an audio output port of the audio noise reduction circuit board; the earplug is internally provided with an in-earplug loudspeaker; and the audio noise reduction circuit board is connected with the in-earplug loudspeaker by means of wireless communication. The earmuff provided by the invention can effectively isolate harsh noises.

Description

Dual Isolation Noise Canceling Earmuffs

technical field

The invention relates to audio equipment technology, in particular to a double-isolated noise reduction earmuff technology.

Background technique

Earmuffs are usually used to isolate harsh sounds, and traditional earmuffs are usually shells with simple structures, and the noise isolation effect is also poor. Some earmuffs are also equipped with an in-hood speaker in the earmuff shell, through which the audio signal of an external audio device can be played, but only the earmuff shell is responsible for noise isolation, and the noise isolation effect is poor, which will affect the listening sound quality .

Contents of the invention

Aiming at the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a double-isolation noise reduction earmuff with good noise isolation effect.

In order to solve the above-mentioned technical problems, the present invention provides a double-isolated noise-reducing earmuff, including an earmuff shell, an audio noise reduction circuit board installed in the earmuff shell, a speaker in the cover, and an audio frequency of the speaker in the cover. The port is connected to the audio output port of the audio noise reduction circuit board;

It is characterized in that: it also includes an earplug that can be placed in the earmuff shell; the earplug is built with an in-plug speaker, and the audio frequency noise reduction circuit board is connected to the in-plug speaker through wireless communication.

Further, a pickup is installed on the outer wall of the earmuff shell, and the audio port of the pickup is connected to the audio input port of the audio noise reduction circuit board.

Further, the audio noise reduction circuit board is connected to the speaker in the plug through infrared communication.

Further, the audio noise reduction circuit board is connected to the speaker in the plug through radio frequency communication.

The double-isolated noise-reducing earmuffs provided by the present invention can form double noise-reducing protection through the earmuff shell and earplugs, have the characteristics of good noise isolation effect, and can also use the single-layer noise-reducing protection formed by the earmuff shell alone. , you can change the noise reduction level according to the usage environment.

Description of drawings

Fig. 1 is a schematic structural view of a double-isolated noise reduction earmuff according to the first embodiment of the present invention;

Fig. 2 is a schematic structural view of the earplugs in the double-isolated noise reduction earmuffs of the first embodiment of the present invention;

Fig. 3 is a schematic structural view of the earmuff shell in the double-isolated noise-reducing earmuff according to the first embodiment of the present invention.

detailed description

The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention. All similar structures and similar changes of the present invention should be included in the scope of protection of the present invention. The commas in all indicate the relationship between and.

As shown in Figures 1-2, a double-isolated noise reduction earmuff provided by the first embodiment of the present invention includes an earmuff shell 1 and an audio noise reduction circuit board installed in the earmuff shell 1 3. The speaker 2 inside the cover, the audio port of the speaker 2 inside the cover is connected to the audio output port of the audio noise reduction circuit board 3;

It is characterized in that: it also includes an earplug 4 that can be placed in the earmuff shell 1; the earplug 4 has a built-in speaker 5 in the plug, and the audio noise reduction circuit board 3 is connected to the speaker 5 in the plug through infrared communication.

In the first embodiment of the present invention, a sound pickup 6 is installed on the outer wall of the earmuff shell 1 , and the audio port of the sound pickup 6 is connected to the audio input port of the audio noise reduction circuit board 3 .

In the first embodiment of the present invention, the audio noise reduction circuit board is an existing technology, and the audio noise reduction circuit board is used to process the audio signal output by the pickup, and output the audio signal to the speaker in the cover and the speaker in the plug.

The usage mode of the first embodiment of the present invention has following two kinds:

The earmuff shell and earplugs are used at the same time: first insert the earplug into the user's ear canal, and then cover the user's ear with the earmuff shell; in this way, the audio noise reduction circuit board passes the processed audio signal through Infrared communication is sent to the speaker in the plug for playback. The earmuff shell is the basis of physical isolation. It fits the ear to isolate harmful external noise and forms the first layer of noise protection. The earplugs are inserted into the ear canal to form the second layer of physical isolation protection. Double the sound isolation effect can be obtained; by adjusting the sending and receiving sensitivity of the infrared communication signal, the audio noise reduction circuit board and the speaker in the plug can only communicate at short distances, so that after the earmuff shell is taken off, the speaker in the plug cannot communicate with The audio noise reduction circuit board continues to communicate while also avoiding interference from other infrared signals in the surrounding environment.

Use the earmuff shell alone (without earplugs): cover the earmuff shell to cover the user's ear; in this way, the audio noise reduction circuit board sends the processed audio signal to the speaker inside the cover for playback, and the earmuff shell As the basis of physical isolation, the body fits the ear to isolate harmful external noise, forming a single layer of noise protection;

The pickup picks up the external sound and transmits it to the audio noise reduction circuit board. After the audio noise reduction circuit board performs noise reduction processing, it is sent to the speaker in the plug and/or the speaker in the cover for playback. The audio noise reduction circuit board detects the audio sent by the pickup. When the signal is higher than the preset audio upper limit threshold, the audio signal sent by the pickup is subjected to amplitude reduction processing or the output of the audio signal is directly blocked, thereby realizing the protection of the user's hearing.

The difference between the second embodiment of the present invention and the first embodiment is that in the second embodiment, the audio noise reduction circuit board is connected to the speaker in the plug through radio frequency communication.

In the second embodiment of the present invention, by adjusting the sensitivity of sending and receiving radio frequency communication signals, the audio noise reduction circuit board and the speaker in the plug can only communicate at short distances, so that after the earmuff shell is removed, the speaker in the plug cannot communicate with the audio noise reduction The board continues to communicate while avoiding interference from other RF signals in the surrounding environment.

In other embodiments of the present invention, the audio noise reduction circuit board may also be connected to the speaker in the plug through other wireless communication methods.

The first and second embodiments of the present invention all pick up the external sound through the pickup and transmit it to the audio noise reduction circuit board. In other embodiments of the present invention, the pickup can also be changed into an audio input socket, so that other audio can be output The audio output from the device is used as the audio source.

Claims (4)

1. A double-isolated noise reduction earmuff, comprising an earmuff shell, an audio noise reduction circuit board installed in the earmuff shell, a speaker in the cover, and the audio port of the speaker in the cover is connected to the audio noise reduction circuit board audio output port; It is characterized in that: it also includes an earplug that can be placed in the earmuff shell; the earplug is built with an in-plug speaker, and the audio frequency noise reduction circuit board is connected to the in-plug speaker through wireless communication. 2. The double-isolated noise reduction earmuff according to claim 1, characterized in that: a pickup is mounted on the outer wall of the earmuff shell, and the audio port of the pickup is connected to the audio input port of the audio noise reduction circuit board . 3. The double-isolated noise reduction earmuff according to claim 1 or 2, wherein the audio noise reduction circuit board is connected to the speaker in the plug through infrared communication. 4. The double-isolated noise reduction earmuff according to claim 1 or 2, wherein the audio noise reduction circuit board is connected to the speaker in the plug through radio frequency communication.