JPH10145163A - Automatic sound volume controller for radio machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for a microphone only for peripheral noise measurement by providing a microphone for sound input and for peripheral noise measurement, measuring peripheral noise and automatically adjusting a sound volume with the result. SOLUTION: At the time of transmission, the sound of an opposite party cannot be received. Thus, the adjustment of the speaker sound volume is not necessary. At the time of reception, a transmission/reception switch part 102 is switched, and it is set to be a reception state. Thus, the sound of the opposite side is transmitted and is outputted form a speaker 106. When peripheral noise is high at that time, it is difficult to hear the sound of the opposite party. Thus, peripheral noise is collected by a microphone 101 which is not used at the time of reception and is measured in a sound volume measuring part 103. Then, the output sound volume of the speaker 106 is adjusted by a sound volume adjusting part 105. Thus, the microphone dedicated only for peripheral noise measurement is eliminated, and the number of parts is reduced and the circuit is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic volume control apparatus for a radio, and more particularly to a speaker microphone for the radio, which collects sounds from a microphone not used at the time of reception to determine the noise level of the surroundings. The present invention relates to a device for automatically adjusting the volume of a speaker during reception.

[0002]

2. Description of the Related Art Conventionally, a sound is output from a speaker at the time of reception of a radio device.
Sometimes the sound is difficult to hear. Therefore, the volume was manually adjusted, and when the surroundings suddenly became noisy, the adjustment was performed each time.

Also, a device for automatically adjusting the volume has been devised. For example, a device having a microphone dedicated to collecting ambient noise in addition to a microphone for transmission has been devised.

Japanese Patent Application Laid-Open No. 04-082331 discloses a device which serves both as a microphone for noise collection and a microphone for speech, and uses a speech codec or the like to convert all input signals. This device calculates background noise excluding call voice and adjusts the volume.

FIG. 4 is a block diagram showing an example of such a conventional device configuration. In FIG. 4, reference numeral 11 denotes a speaker, 12 denotes a microphone (a microphone for measuring ambient noise, etc.), and 13 denotes a speech codec unit.

[0006]

A first problem is that in the prior art, a dedicated microphone must be provided, and the number of parts is increased. The reason is that in the current wireless device, the speaker microphone only performs input / output of only a signal such as a sound, and does not have a configuration for collecting sound such as noise.

The second problem is that in the prior art,
The point is that only the background noise or the like must be analyzed from all the signals input by the speech codec or the like, and the volume must be obtained by calculation. The reason is that, in the current wireless device, the speaker microphone only performs input / output of only a signal such as a sound, and is not configured to collect sound such as noise.

An object of the present invention is to simplify the circuit configuration by reducing the number of parts.

Another object of the present invention is to simplify the circuit configuration by performing automatic volume adjustment without using a complicated circuit such as a conventional speech codec.

[0010]

According to the present invention, there is provided an automatic volume control apparatus for a radio device, which comprises: a microphone for both voice input and ambient noise measurement; A transmission / reception switching unit that outputs a sound input from a microphone to a wireless unit for transmission and outputs the ambient noise input from the microphone to a volume measurement unit upon reception, and a volume measurement unit that measures the magnitude of the ambient noise. Unit, a data processing device that performs automatic control of volume adjustment based on the measurement result, the volume adjustment unit that adjusts the volume output when receiving, and a speaker unit that outputs the volume-adjusted sound. Then, upon reception, ambient noise is collected from the microphone, the loudness of the sound is measured, and the volume is automatically adjusted based on the measurement result.

[0011] The present invention provides: [1] when the volume needs to be adjusted, mainly during reception; and [0024] the microphone unit of the radio unit or the speaker microphone connected to the unit, which is used for transmission, is used for reception. At the time of reception, the volume of the sound around the wireless device is measured from the microphone, and the volume is automatically adjusted based on the measurement result.

An automatic volume control device for a wireless device according to the present invention measures ambient noise level by collecting sound from a microphone not used during reception in a simplex or unidirectional communication device, It is characterized in that the volume of the speaker is automatically adjusted according to the volume.

More specifically, one microphone is used as a microphone for collecting voices and the like at the time of transmission, and a microphone for detecting background noise at the time of reception, and is operated by switching between reception and transmission by a press-talk switch or the like. It is characterized by making it.

[0014]

According to the present invention, the volume can be adjusted without providing a dedicated microphone by using the microphone for transmission and the microphone for detecting background noise at the time of reception.

Further, according to the present invention, the number of microphones for collecting sound and converting it into an electric signal is one for inputting a signal such as voice and for inputting ambient noise for use in volume adjustment. Thus, the circuit configuration can be mainly simplified.

Further, according to the present invention, since ambient noise is collected at the time of reception, it is possible to collect only ambient noise in which voice is not mixed. Therefore, automatic volume adjustment can be performed without using a circuit such as a conventional speech codec, and the circuit configuration can be simplified.

[0017]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

[1] Description of Configuration FIG. 1 is a block diagram showing the configuration of the present invention. Referring to FIG. 1, a first embodiment of the present invention includes a microphone (101) that also serves as a microphone for voice and the like (hereinafter, referred to as a microphone), a microphone (101) for measuring a surrounding noise and the like, and transmission and reception. A transmission / reception switching unit (102) such as a press-talk switch, a volume measurement unit (103) for measuring the level of ambient noise, and a data processing device (104) for controlling volume adjustment based on the measurement result. A volume adjustment unit (105) for adjusting the volume of a sound or the like output at the time of reception, a speaker unit (106) and a radio unit (107) for actually outputting a sound or the like
Having.

[2] Description of Operation Next, the operation of the embodiment of the present invention will be described in detail with reference to FIG.

FIG. 2 is a diagram showing the operation of the device of the present invention at the time of transmission and at the time of reception.

When transmitting from a wireless device: First, a transmission state is set by switching a press-talk switch (transmission / reception switching unit) of the wireless device. At this time, the microphone of the wireless device has a function of converting transmitted sound and the like into an electric signal. The electric signal is modulated to a high frequency and sent as radio waves to the wireless device of the other party.

At this time, since the voice of the other party cannot be received, there is no need to adjust the volume of the speaker.

In the case of reception by the wireless device: The receiving state is set by switching the press talk switch of the wireless device. At this time, a signal such as voice is sent from the other party's wireless device,
Although the output is performed from the speaker, if the surrounding noise or the like is large, the sound or the like may be very difficult to hear.

Therefore, ambient noise is collected from a microphone that is not used at the time of reception, the magnitude is measured, and the volume output from the speaker is automatically adjusted based on the data.

That is, at the time of transmission, the sound input from the microphone is output to the radio unit for transmission, and at the time of reception, switching is performed by the transmission / reception switching unit to output the ambient noise input from the microphone to the volume measurement unit. Perform

FIG. 3 is a diagram showing the flow of data and voice at the time of transmission and reception of the device of the present invention.

[0027]

The first effect is that a dedicated microphone for measuring ambient noise is not required, so that the number of parts can be reduced and the circuit can be simplified. The reason for this is that the microphone of the speaker microphone is not used at the time of reception where sound or the like is output from the speaker, and ambient noise is measured using the microphone, so that only one microphone is required.

The second effect is that a circuit for calculating background noise from all input signals and adjusting the volume by using a speech codec or the like as in the related art is unnecessary, so that the circuit configuration is reduced. Can be easy. The reason is,
This is because ambient noise is collected at the time of reception, so that only ambient noise without sound mixing can be collected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of the present invention.

FIG. 2 is a diagram illustrating the operation of the device of the present invention during transmission and reception.

FIG. 3 is a diagram showing the flow of data and voice during transmission and reception of the device of the present invention.

FIG. 4 is a block diagram showing a configuration of a conventional device.

[Explanation of symbols]

 Reference Signs List 101 microphone for sound and noise measurement 102 transmission / reception switching unit (press-to-talk switch) 103 volume measurement unit for measuring the level of noise 104 data processing unit for giving control instructions such as volume adjustment 105 volume adjustment unit 106 for controlling actual volume 106 voice Speaker section 107 for outputting information etc. Radio section

Claims (2)

[Claims] 1. A microphone which is used for both voice input and ambient noise measurement, and outputs a voice input from the microphone to a radio unit for transmission during transmission, and outputs ambient noise input from the microphone during reception. A transmission / reception switching unit that outputs the volume to the volume measurement unit, the volume measurement unit that measures the magnitude of the ambient noise, a data processing device that performs automatic control of volume adjustment based on the measurement result, and a volume that is output during reception. And a speaker unit for outputting the volume-adjusted sound. Upon reception, ambient noise is collected from the microphone to measure the loudness of the sound, and the measurement result is obtained. An automatic volume control device for a wireless device, wherein the automatic volume control is performed on the basis of an audio signal. 2. The apparatus according to claim 1, wherein the transmission / reception switching unit is a press talk switch.