JPH05252253A - Telephone set - Google Patents

Abstract

PURPOSE:To attain call reception easy of hearing by variably amplifying sound volume of a reception signal passing through a filter in response to a control signal and sending the amplified signal to a receiver so as to eliminate frequencies higher than a voice frequency. CONSTITUTION:A voice signal from a caller side telephone set enters a speech circuit 2 via a telephone line and noise with a frequency higher than a frequency of a voice signal generated on a transmission line or in an exchange is eliminated by a noise filter 4. The reception signal with noise eliminated therefrom is given to a sound volume control section 1, in which the level is detected. The control section 1 converts a difference between the level of the voice signal with a level of a voice signal equivalent to a preset proper sound volume into a control signal and sends the result to an amplifier section 5. The amplifier section 5 amplifies the reception signal with the noise eliminated therefrom with a control signal and sends the result to a receiver 3.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to telephones.

[0002]

2. Description of the Related Art A conventional telephone has a structure for manually adjusting a reception volume.

[0003]

Since the above-mentioned conventional telephone has a structure in which the volume of the received voice is manually adjusted, the noise is loud and difficult to hear by the manual volume adjustment, and the calling side is also difficult to hear. In case of adjustment, there is a problem that the called party must convey the intention to the calling party, and the calling party must make a loud voice. .

[0004]

A telephone according to the present invention corresponds to a filter for removing a signal outside a frequency band of a voice signal from a received signal and a level detected by detecting a level of the received signal passing through this filter. And a volume control section for transmitting a control signal for controlling the volume, and an amplification section for variably amplifying the volume of the reception signal that has passed through the filter according to the control signal and transmitting it to the receiver.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

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

In FIG. 1, the telephone of this embodiment is provided with a call circuit 2 for interfacing with a telephone line, a noise filter 4 for removing a signal outside a frequency band of a voice signal from a received signal through the call line 2, Noise filter 4
Volume control unit 1 which detects the level of the reception signal that has passed through and outputs the control signal corresponding to the detected level, and the reception signal which has passed through the noise filter 4 by variably amplifying the volume according to the control signal 3 and the amplifying section 5 for sending the data to the A.

Next, the operation of this embodiment will be described.

It is assumed that the calling side telephone and the called side telephone of this embodiment are connected via a telephone line and an exchange (not shown) and are in a call state.

When a voice signal is emitted from the calling telephone, it enters the communication circuit 2 through the telephone line and the noise filter 4 removes noise having a frequency higher than the frequency of the voice signal generated on the transmission line or in the exchange. .

The noise-removed reception signal enters the volume control unit 1, and the level of the noise-removed reception signal is detected. The volume control unit 1 converts the difference between the level of the reception signal and the level of the voice signal corresponding to the preset proper volume into a control signal, and sends it to the amplification unit 4.

The amplification section 5 amplifies the received signal from which noise has been removed by the control signal and sends it to the handset 3.

[0013]

As described above, the present invention corresponds to the filter for removing the signal outside the frequency band of the voice signal from the reception signal and the level detected by detecting the level of the reception signal passing through this filter. By having a volume control unit that sends a control signal and an amplification unit that variably amplifies the volume of the received signal that has passed through the filter according to the control signal and sends the amplified signal to the receiver, frequencies higher than the voice frequency are removed. Therefore, there is an effect that an easy-to-hear call can be received.

[Brief description of drawings]

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

[Explanation of symbols]

 1 Volume control unit 2 Call circuit 3 Handset 4 Noise filter 5 Amplification unit

Claims (1)

[Claims] 1. A filter for removing a signal outside a frequency band of a voice signal from a reception signal, and a volume control section for detecting a level of the reception signal passing through the filter and transmitting a control signal corresponding to the detected level. A telephone unit, comprising: an amplification unit that variably amplifies a volume of a reception signal that has passed through the filter according to the control signal and sends the amplified reception signal to a receiver.