JPH05110637A - Telephone set - Google Patents

Abstract

PURPOSE:To adjust a reception tone volume in a proper value by detecting a sound volume of surrounding noise at a location where talking is executed. CONSTITUTION:The surrounding noise at a location where talking is implemented is collected by a microphone 6 and a sound volume measurement circuit 7 measuring the sound volume measures a minimum sound volume of the surrounding noise for each prescribed period and for each prescribed interval. A reception sound volume adjustment circuit 8 adjusting the level of the received sound volume adjusts the received sound volume to a proper value by using the measured value as a parameter.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to telephones.

[0002]

2. Description of the Related Art The structure of a conventional telephone is shown in FIG.

In FIG. 2, reference numeral 1 is a telephone connected to a central office line 2 and comprises a dial operation section 3, a control circuit 4 for controlling the functions, a communication circuit 5, and a handset 10. The earpiece volume obtained from the handset 10 during a call is determined by the transmission loss of the used line path, the utterance volume of the other party of the call, and the utterance volume of the other party's telephone.

[0004]

In the conventional telephone, the reception volume is uniquely determined by the transmission loss of the line used, the utterance volume of the other party of the call, and the transmission volume of the other party's telephone, and the surroundings of the telephone. Since it is not related to the level of noise, there is a problem that the call may be difficult or impossible due to the influence of ambient noise.

The present invention solves the above-mentioned problems of the prior art by automatically detecting the noise around the telephone and adjusting the received sound volume to an appropriate value according to the volume of the sound. It is an object of the present invention to provide a caller with a telephone that realizes the same easiness of listening.

[0006]

In order to achieve the above object, the present invention has a microphone as a noise detecting means for collecting ambient noise around a place where a call is made, and a microphone for collecting the noise. The configuration has means for measuring the minimum value of the sound volume at regular intervals, and means for automatically adjusting the listening volume in the telephone according to the measured minimum value of the volume.

[0007]

According to the present invention, when the ambient noise is increased, the listening volume is automatically increased, and when the ambient noise is reduced, the listening volume is automatically decreased. You can make calls with.

[0008]

FIG. 1 shows an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a telephone body, which is connected to a central office line 2. As in the conventional example, a dial operation unit 3, a control circuit 4, and a call circuit 5 are provided inside the telephone body 1, but in addition, a microphone 6 as a noise detection means for detecting ambient noise, a minimum A volume measuring circuit 7 which is a volume measuring means for measuring the volume and a volume adjusting circuit 8 which is a receiving volume adjusting means for automatically adjusting the receiving volume of the handset 9 are newly added.

Next, the operation of the above configuration will be described. First, ambient noise is collected by the ambient noise detection microphone 6. Next, a circuit for measuring the minimum volume of the ambient noise collected by the microphone by the circuit 7 for measuring the minimum volume for a certain period of time, and a circuit for adjusting the reception volume according to the minimum volume. By 8, the reception volume is adjusted to an appropriate value. Then, the minimum volume of the ambient noise volume for a certain period is measured again at a certain interval, and the reception volume is adjusted to an appropriate value. The microphone 6 for detecting the ambient noise also collects the voice uttered by the speaker who is talking, so the circuit 7 for measuring the minimum value of the volume is used for the period during which the volume of the ambient noise is detected. It is set to be longer than the longest time interval for a person to normally speak continuously.

As the volume of the ambient noise increases, the minimum value of the detected volume also increases. Therefore, the circuit 8 for adjusting the reception volume adjusts the volume of the audible volume when the ambient noise is the smallest and the volume of the same audibility. Until, when the ambient noise decreases, the minimum value of the detected sound volume decreases as the ambient noise decreases. Therefore, the circuit 8 for adjusting the reception volume automatically decreases the reception volume.

[0012]

As is apparent from the above-described embodiments, the present invention has the effect that it is possible to prevent a decline in reception quality due to ambient noise in the place where a call is being made, and to always provide the caller with a certain level of listening comfort. Have.

[Brief description of drawings]

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

FIG. 2 is a block diagram of a conventional telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone 2 Station line 3 Dial operation part 4 Control circuit 5 Communication circuit 6 Microphone 7 Volume measurement circuit 8 Reception volume adjustment circuit 9, 10 Handset

Claims (4)

[Claims] 1. A noise detecting means for detecting ambient noise, a volume measuring means for measuring a volume of noise obtained from the noise detecting means, and a reception volume according to a volume value measured by the volume measuring means. A telephone equipped with an earpiece volume adjusting means for adjusting. 2. The telephone according to claim 1, wherein the volume measuring means measures a minimum volume of the volume of the noise. 3. The telephone according to claim 1, wherein the volume measuring means measures at a time interval of a fixed period. 4. The telephone according to claim 1, wherein the volume measuring means continuously measures for longer than an average time for a speaker to speak continuously.