TWI589164B - Microphone with automatic mute function - Google Patents

Description

Microphone with automatic mute

The invention relates to a microphone, in particular to a microphone with an automatic mute function.

In places where many people need to speak or sing, such as speeches or concerts, it is usually necessary to use a microphone or other sound pickup and sound amplification device to amplify the output of the speaker or singer. Although the burden on the user's throat can be reduced by the microphone, and the sound can be clearly transmitted to a farther place, during the use of the microphone, it is easy to cause an annoying feedback noise due to the mistake of the microphone head toward the speaker and the speaker. Although some microphones are designed with a mute switch, when the microphone output sound signal needs to be stopped to avoid feedback noise, the mute switch is activated to activate the mute mode, but this design requires an additional mute switch design, but the user often occurs. Forgetting to operate the mute switch again to turn off the silent mode, and having to pause and check the microphone after starting to talk, it will cause trouble for the user, which is quite inconvenient.

Therefore, the object of the present invention is to provide an automatic mute function. Microphone.

Thus, the microphone of the present invention having an automatic mute function includes a housing, and a pickup circuit and a mute control circuit respectively mounted to the housing. The pickup circuit picks up the surrounding sound to output an audio signal. The mute control circuit is connected to the sound collecting circuit, and includes a touch sensing module and a mute processing module. The touch sensing module can sense one when the human body does not touch the casing. The idle signal, the mute processing module can be triggered by the idle signal to activate a silent mode, and the audio signal output by the sound collecting circuit is muted.

The effect of the invention is that the housing and the mute control circuit can cooperate to sense whether the user holds the microphone to automatically determine whether to activate the design of the mute function, and the user can automatically start the operation without any operation of any button. This silent mode of the microphone is an innovative microphone design.

3‧‧‧Shell

31‧‧‧ Holding the body

32‧‧‧ sound head

4‧‧‧ pickup circuit

5‧‧‧Pre-signal processing circuit

6‧‧‧Mute control circuit

61‧‧‧Touch sensing module

611‧‧‧Sensor electrode

612‧‧‧electrode layer

613‧‧‧ dielectric layer

614‧‧‧Capacitive sensing unit

615‧‧‧Touch judgment unit

62‧‧‧ Radio judgment module

63‧‧‧Mute processing module

7‧‧‧Signal output circuit

800‧‧‧ boards

900‧‧‧Back-end loudspeakers

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a perspective view of one embodiment of a microphone with automatic mute function of the present invention; FIG. 2 is a perspective view of the embodiment. 3 is a functional block diagram of the embodiment; FIG. 4 is a side cross-sectional view of the embodiment; Figure 5 is a cross-sectional view of the embodiment.

Referring to Figures 1, 2, and 3, an embodiment of the microphone with automatic mute function of the present invention is described by taking a wireless microphone as an example. The microphone includes a housing 3 and a pickup respectively mounted to the housing 3. The circuit 4, a pre-signal processing circuit 5, a mute control circuit 6 and a signal output circuit 7, in the embodiment, the pre-signal processing circuit 5, the mute control circuit 6 and the signal output circuit 7 are integrated It is formed into a circuit board 800, but it is not limited to this.

The housing 3 has a grip body 31 for gripping and a head 32 mounted to the grip body 31. In the present embodiment, the holding body 31 is hollow tubular and made of a conductive material, but the outer shape of the housing 3 is not limited thereto.

The pickup circuit 4 is mounted in the head 32 and can pick up ambient sound to generate an audio signal. Since the sound pickup circuit 4 picks up the sound to output the audio signal as a conventional technique, and the manner is numerous, it will not be described in detail.

The pre-signal processing circuit 5 can perform pre-signal processing on the audio signal output from the sound collecting circuit 4, and then transmit the audio signal to the mute control circuit 6. The so-called pre-signal processing includes filtering noise and signal amplification processing, but not limited to the above.

The mute control circuit 6 is connected to the pre-signal processing circuit 5 The signal output circuit 7 includes a touch sensing module 61, a sound determining module 62, and a mute processing module 63.

The touch sensing module 61 is mounted and coupled to the holding body 31, and can sense and output a touch when the user's hand is gripped and touched to the holding body 31. Signal. The touch sensing module 61 includes a sensing electrode 611 that is insulatively attached to the inner peripheral surface of the holding body 31 , and a capacitive sensing unit 614 electrically connected to the sensing electrode 611 . And a touch connection unit 615 connected to the capacitance sensing unit 614. The sensing electrode 611 has a plate electrode layer 612 made of a conductive material and electrically connected to the capacitance sensing unit 614, and a dielectric layer 613 coated on the surface of the electrode layer 612 and made of an insulating material. The sensing electrode 611 is opposite to the holding body 31 by the dielectric layer 613, and the electrode layer 612 is spaced apart from the holding body 31, and can be held in contact with the user's hand. When the body 31 is engaged with the holding body 31, a capacitive effect is generated. The capacitance sensing unit 614 can sense a change in capacitance of a capacitive effect when the user's hand contacts the holding body 31 via the sensing electrode 611, and output a capacitance value.

The touch determination unit 615 has a built-in capacitance condition for the user to hold the housing 3, for example, whether the capacitance value output by the capacitance sensing unit 614 is within a range of values, or is greater than a specific value. The capacitance value outputted by the capacitance sensing unit 614 can be received and analyzed according to the capacitance condition. If the capacitance value meets the capacitance condition, a touch signal representing that the housing 3 is held is correspondingly output. If the high level signal does not match the capacitor condition, an idle signal representing the unheld state of the housing 3, such as a low level signal, is output.

The sound determination threshold module 62 has an audio threshold value, and can receive and analyze the signal noise ratio of the audio signal output by the pre-signal processing circuit 5 according to the audio threshold value, and the ratio of the signal noise is greater than the signal noise ratio. The audio threshold value outputs a speech signal indicating that the user is emitting a sound to the sound collecting circuit 4, such as a high level signal, and the signal noise ratio is less than the audio threshold value, and the output is a representative that the user is not The sound pickup circuit 4 emits a soundless signal, such as a low level signal.

The mute processing module 63 can receive and analyze the signals output by the touch sensing module 61 and the radio determining module 62. When the mute processing module 63 receives the idle signal and the no-sound signal at the same time, it indicates that the microphone is not taken, and the user does not sound the microphone. At this time, the mute processing module 63 is The idle signal is triggered together with the no-sound signal to activate a silent mode, and the audio signal outputted by the sound collecting circuit 4 is muted, so that the microphone of the present invention does not output the signal to the back-end sound amplification device. When the mute processing module 63 receives the touch signal and the no-sound signal at the same time, it indicates that the microphone is being held, but the user does not speak to the microphone. At this time, the mute processing module 63 also The touch signal is triggered by the touch signal to activate the silent mode, and the audio signal output by the sound collection circuit 4 is muted, so the signal output circuit 7 does not output the signal to the back end sound amplification device ( The figure is not shown).

When the mute processing module 63 receives the touch signal and the speech signal at the same time, or receives the idle signal and the speech signal at the same time, it indicates that the user is speaking into the microphone, and the mute processing module 63 does not It will be triggered by the signals, that is, the silent mode will not be activated, so the audio signal outputted from the sound collecting circuit 4 will not be muted, and the silent processing module 63 will transmit the audio signal to the signal output circuit. 7, and output to the back end of the sound reinforcement device.

In this embodiment, the signal output circuit 7 wirelessly transmits the audio signal to the back-end sound amplification device through a wireless communication technology, but when implemented, the signal output circuit 7 can also be designed to be a signal line (not shown) ) plugging, and the aspect of the audio signal can be output via the signal line.

It should be noted that, in the above embodiment, the holding body 31 of the housing 3 is designed to be made of a conductive material, and can be charged by the human body when the user grips the holding body 31. The characteristic induces the holding body 31 and the dielectric layer 613 to cooperate with the electrode layer 612 to change the capacitance value of the capacitive effect, thereby determining whether the user holds the microphone. In practice, the holding body 31 can also be made of an insulating material, and the sensing electrode 611 is attached and fixed to the inner circumferential surface of the holding body 31 via the dielectric layer 613, since the human body is a charged body. a good conductor, so when the human body contacts the holding body 31, the capacitive effect can still be generated by the sensing electrode 611. Therefore, it is also possible to determine whether the user holds the capacitance change by sensing the capacitance effect. Use this microphone.

In the above embodiment, the mute control circuit 6 determines whether to activate the silent mode by simultaneously determining whether the user holds the microphone and whether the user emits a sound to the microphone. However, when implemented, the mute control circuit 6 can be implemented. It is designed to determine whether to activate the silent mode only by determining whether the user holds the microphone, that is, the radio judgment module 62 is not necessary.

In summary, the housing 3 and the mute control circuit 6 can cooperate to sense whether the user holds the microphone to automatically determine whether to activate the design of the mute function, and the user can automatically start without any operation of any button. The silent mode of the microphone can further cooperate with detecting whether the user speaks the microphone to more accurately determine whether the user is using the microphone, and can automatically automatically when the user holds the microphone but does not speak. Start the silent mode. With the above design, the influence of the feedback signal feedback can be directly removed from the source of the sound, and the problem of feedback noise can be greatly improved. It is an innovative microphone design, which is quite convenient and practical, and thus can achieve the object of the present invention.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

4‧‧‧ pickup circuit

5‧‧‧Pre-signal processing circuit

6‧‧‧Mute control circuit

61‧‧‧Touch sensing module

611‧‧‧Sensor electrode

614‧‧‧Capacitive sensing unit

615‧‧‧Touch judgment unit

62‧‧‧ Radio judgment module

63‧‧‧Mute processing module

7‧‧‧Signal output circuit

900‧‧‧Back-end loudspeakers

Claims (7)

A microphone with automatic mute function, comprising: a casing; a sound collecting circuit installed in the casing and capable of picking up surrounding sound to output an audio signal; and a mute control circuit mounted on the casing and connected to the signal The sound collecting circuit includes a touch sensing module, a sounding determining module, and a mute processing module, and the touch sensing module can sense an idle when the human body does not touch the casing. a signal, the sound judging module can receive the audio signal outputted by the sound collecting circuit, and output a no-sound signal when the signal noise ratio of the audio signal is less than a threshold value, the mute processing module will When the idle signal and the no-sound signal are received at the same time, a silent mode is triggered, and the audio signal output by the sound collecting circuit is muted. The microphone with automatic mute function as claimed in claim 1, wherein the touch sensing module comprises a sensing electrode, a capacitance sensing unit, and a touch determining unit, wherein the sensing electrode is the same The body is insulatively mounted to the housing and can cooperate with the housing to generate a capacitive effect. The capacitive sensing unit can sense the capacitive effect via the sensing electrode to output a capacitance value. The touch determination unit is A capacitance condition is established to represent that the housing is held, and the idle signal can be output when it is determined that the capacitance value does not meet the capacitance condition. The microphone with the automatic mute function as claimed in claim 1, wherein the touch determination unit can output one when determining that the capacitance value meets the capacitance condition The touch signal is triggered by the mute processing module when the touch signal and the no-sound signal are simultaneously received, and the audio signal is muted. The microphone of the automatic mute function of claim 1, wherein the sound determination module outputs a speech signal when the signal noise ratio of the audio signal is greater than the threshold, and the mute processing module receives The silent mode is turned off when the idle signal is received and the speech signal is received at the same time. The microphone with automatic mute function as claimed in claim 1 or 2, further comprising: filtering and amplifying the audio signal outputted by the sound collecting circuit, and then outputting the processed audio signal to the mute control circuit The pre-signal processing circuit. The microphone having an automatic mute function according to claim 1 or 2, wherein the housing has a gripping body for holding, and a mounting body for mounting the pickup module a sound electrode, the sensing electrode has an electrode layer electrically connected to the capacitance sensing unit and spaced apart from the holding body, and an insulating material covering the surface of the electrode layer and abutting against the holding body Dielectric layer. A microphone having an automatic mute function according to claim 6, wherein the holding body is made of one of a conductive material and an insulating material.