JPH0530161A - Telephone set with automatic adjsuting function for call tone volume - Google Patents

Abstract

PURPOSE:To always realize a clear call tone by calculating the average value of peripheral noise levels, controlling the amplification rate of a call tone amplifier based on the above value and automatically adjusting a call tone volume. CONSTITUTION:A noise detector 8 detects noise, sets it to an electric signal and transmits it to a call tone volume controller 7. The controller 7 samples noise at every prescribed time, calculates the average value of noise at certain time and transmits it to a call tone amplifier 5 by the size of the electric signal. The call tone inputted from a telephone line 1 and is transmitted to a telephone line network 2 is amplified high when the average value of peripheral noise is high and low when the value is low so as to transmit it to a speaker 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone for automatically adjusting ringing volume.

[0002]

2. Description of the Related Art Generally, a telephone has a constant ambient noise depending on the installation location. However, when moving such as a train telephone, the ambient noise changes, and it is necessary to increase the volume of the ringing tone in a noisy place. is there. FIG. 4 shows a block diagram of a conventional telephone. In the figure, 1 is a telephone line, 2 is a telephone circuit network, 3 is a transmitter, 4 is a receiver, 5 is a ring tone amplifier, 6 is a speaker, and 9 is a speaker.
Is a volume for adjusting the ringing tone. When there is an incoming call,
A ringing tone is input to the telephone line 1, and the ringing tone is heard by the telephone network 2, ringing tone amplifier 5 and speaker 6. In this case, if the ambient noise is large, the ringing sound is increased by the volume 9, and if the noise is small, the ringing sound is reduced. However, in such a method, it is necessary to adjust the ringing tone with the volume 9 every time the ambient noise changes, which is very complicated.

[0003]

Since the above-mentioned prior art is of a manual type, it has a drawback that the loudness of the ringing volume cannot sufficiently cope with changes in ambient noise. In order to solve these drawbacks, it is an object of the present invention to detect a change in ambient noise and automatically change the volume of ringing volume so that a clear ringing tone can always be heard.

[0004]

In order to achieve the above object, the present invention constantly detects ambient noise, calculates an average value of noise at regular time intervals, and determines the level of a ringing tone based on the average value. It is designed to be automatically adjusted.

[0005]

As a result, the ringing volume is automatically increased in a place where noise is loud and the ringing volume is reduced in a place where noise is low, so that a clear ringing tone can always be heard even if the ambient noise changes. ..

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be explained. In FIG. 1, 1 is a telephone line, 2 is a telephone circuit network,
3 is a transmitter, 4 is a receiver, 5 is a ring tone amplifier, 6 is a speaker, 7 is a ring volume controller, and 8 is a noise detector. This operation will be described below. The noise detected by the noise detector 8 is converted into an electric signal and transmitted to the ringing volume controller 7. As shown in FIG. 2, the ringing volume controller 7 samples the noise at every T1 time, calculates the average value of the noise during a certain T2 time, and calculates the ringing sound amplifier 5 according to the magnitude of the electric signal.
Communicate to. For example, when the noise is loud, a large electric signal is transmitted, and when the noise is small, a small electric signal is transmitted. The ringing tone amplifier 5 amplifies the ringing tone input from the telephone line 1 and transmitted to the telephone network 2 when the ambient noise is large, and amplifies the ringing tone when the noise is small and transmits it to the speaker 6. .. As a result, as shown in FIG. 3, the amplification factor of the ringing volume changes every T2 hours according to the external noise. That is, if the external noise is large, the ringing volume becomes large, and if the external noise is small, the ringing volume becomes small.

[0007]

According to the present invention, even if the ambient noise changes, the ringing volume can be automatically adjusted without manual adjustment, and a clear ringing tone can always be heard.

[Brief description of drawings]

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

FIG. 2 is a diagram for explaining a control system of a ringing volume controller.

FIG. 3 is a diagram showing the relationship between external noise and ringing volume amplification factor.

FIG. 4 is a block diagram of a conventional telephone.

[Explanation of symbols]

 1 Telephone line 2 Telephone network 5 Ringer amplifier 6 Speaker 7 Ringer volume controller 8 Noise detector

Claims (1)

Claim: What is claimed is: 1. A ring tone amplifier of a telephone always detects ambient noise, calculates an average value of the noise level at fixed time intervals, and amplifies the ring tone amplifier based on this average value. A telephone with a ringing volume automatic adjustment function, which is connected with a device for controlling the rate and increases the ringing volume when the noise is loud and reduces the ringing volume when the noise is small.