JPH04258068A - Telephone set - Google Patents

Abstract

PURPOSE:To prevent a call tone from being unheard due to surrounding noise. CONSTITUTION:This telephone set is provided with an incoming call detection circuit 10 receiving a call, a surrounding noise detection circuit 5 started by an output of the incoming call detection circuit 10 and detecting a surrounding noise level, a comparator circuit comparing the surrounding noise level with a preset noise level and outputting a comparison result level signal, a call tone volume control circuit 7 outputting a control signal for a call tone with an output of the comparator circuit 6 and a call tone volume variable circuit 8 receiving the control signal to vary automatically the call tone volume from a call tone generating circuit 9 and sends a call tone easily heard at all times.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to telephones.

0002

2. Description of the Related Art A conventional telephone set includes a telephone circuit and a handset for making a call to the other party, a ringing tone generation circuit that detects a calling signal from the other party and sounds a ringer, and a dialing circuit that dials the telephone number of the other party. The system includes a hook switch that opens and closes the telephone line, and when an incoming call is received, the ringer of the ringer generates a ringer at a volume that is manually adjusted in advance.

0003

[Problems to be Solved by the Invention] The above-mentioned conventional telephone is configured so that the ringer of the ringer generating circuit sounds at a volume that is manually adjusted in advance, so the ringer level is reduced. However, if the ambient noise level is high, the ringer may not be audible.

0004

[Means for Solving the Problems] The telephone set of the present invention includes an incoming call detection circuit that detects an incoming call, an ambient noise detection circuit that is activated by the output of the incoming call detection circuit to detect an ambient noise level, and an ambient noise detection circuit that detects an ambient noise level. a comparison circuit that compares the comparison result level signal with a preset noise level and outputs a comparison result level signal, a ring tone control circuit that receives the comparison result level signal and outputs a ring volume control signal, and the control signal. and a ringing volume variable circuit that automatically changes the ringing volume by receiving the ringing volume.

[0005]

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

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

In FIG. 1, the telephone of this embodiment has a hook switch 1 for opening and closing the telephone line, a dialing circuit 2 for dialing the telephone number of the other party, a calling circuit 3 for making a call to the other party, and a receiving/transmitting circuit. handset for talking 4
and an ambient noise detection circuit 5 that detects the ambient noise level and outputs a detection level, and compares the output of the ambient noise detection circuit 5 with a preset normal ambient noise level to determine the comparison result level. A comparison circuit 6 that outputs a signal, a ringing volume control circuit 7 that outputs a ringing volume control signal based on the comparison result level signal, a ringing volume variable circuit 8 that automatically changes the ringing volume based on the control signal, and a ringing volume control circuit 8 that outputs a ringing volume control signal based on the comparison result level signal. The present invention includes a ringing tone generation circuit 9 that detects a call and sounds a ringer, and an incoming call detection circuit 10 that detects an incoming call.

Next, the operation of the telephone according to this embodiment will be explained.

When the incoming call detection circuit 10 detects an incoming call, the ambient noise detection circuit 5 is activated, starts detecting the ambient noise level, and outputs the magnitude of the detected ambient noise level to the comparison circuit 6. The comparison circuit 6 compares the input ambient noise level with a preset normal noise level value, and if the input ambient noise level is the same or smaller, outputs to maintain the normal ringing volume. If the ambient noise level is high, an output is generated to vary the ringing volume in accordance with the ambient noise level. The ringing volume control circuit 7 automatically controls the ringing volume variable circuit 9 in accordance with the output conditions, so that the ringing sound generation circuit 9 always generates a ringing tone that is easy to hear.

0010

As explained above, the present invention includes an incoming call detection circuit that detects an incoming call, an ambient noise detection circuit that is activated by the output of the incoming call detection circuit and detects the ambient noise level, and a A comparison circuit that compares it with a set noise level and outputs a comparison result level signal, a ring volume control circuit that outputs a ring tone control signal based on the output of this comparison circuit, and a ring volume control circuit that automatically adjusts the ring volume in response to the control signal. By having a variable ring tone circuit, it is possible to eliminate the problem of the ring tone being inaudible due to ambient noise that occurs with conventional telephones, and it is possible to always send out a ring tone that is easy to hear. be.

[Brief explanation of the drawing]

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

[Explanation of symbols]

1 Hook switch 2 Dial circuit 3 Call circuit 4 Handset 5 Ambient noise detection circuit 6 Comparison circuit 7 Ringer volume control circuit 8. Ringer volume variable circuit 9 Ring tone generation circuit 10 Incoming call detection circuit

Claims (1)

[Claims] 1. An incoming call detection circuit that detects an incoming call, an ambient noise detection circuit that is activated by the output of the incoming call detection circuit and detects an ambient noise level, and a noise level that is set in advance as the ambient noise level. a comparison circuit that compares and outputs a comparison result level signal; a ring tone control circuit that receives the comparison result level signal and outputs a ring volume control signal;
A telephone set comprising a ringing volume variable circuit that receives the control signal and automatically varies the ringing volume.