JPH0766911A - Telephone set - Google Patents

Abstract

PURPOSE:To automatically adjust the sound volume of a call bell sound adapted to the variation of the sound volume of ambient noise. CONSTITUTION:By taking the variation of ambient noise into consideration, a user of this telephone set sets in advance a period for measuring the sound volume of the peripheral noise by a measuring period setting part 5, and also, sets in advance the sound volume of a call bell sound in a state that the peripheral noise does not exist by a sound volume setting part 6. When a call signal is detected by a call signal detecting part 2 through a line 9 and an interface part 1, a sound volume measuring part 4 measure the sound volume of the peripheral noise from a sensor 3 for a period set in advance. A sound volume control part 7 control a call bell sound generating part 8 so as to become the sound volume obtained by adding the sound volume of the measured peripheral noise to the sound volume set in advance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone, and more particularly to a telephone capable of varying the volume of a ringing tone corresponding to the volume of ambient noise.

[0002]

2. Description of the Related Art A conventional telephone of this type will be described with reference to the drawings.

FIG. 2 is a block diagram showing a conventional example.

This conventional example is disclosed in Japanese Unexamined Patent Publication No. 63-124659 as "a telephone for automatically adjusting ringing tone".

The operation of this conventional example will be described.

In FIG. 2, the call line 101 is connected by the transmission / reception changeover switch 12 to the calling means 21 when not in use, and is connected to the handset 14 and the callee designation unit 15 when in use. When the telephone receives a call signal through the call line 101 when not in use, this signal is applied to the call signal detector 13 of the call means 21 through the transmission / reception changeover switch 12, where only the call signal is extracted and its output is excited. It is output to the unit 18. A drive signal is output from the excitation unit 18 to a ringing tone generating unit 19 including a speaker or a sounding body, where the ringing tone is radiated into the air to confirm the ringing. Also, the excitation unit 1
The control signal 8 is input to control the magnitude of the drive signal output from the excitation unit 18.

On the other hand, the noise detecting means 22 is the noise detecting circuit 1
6 and a microphone 17, noise around the telephone is collected by the microphone 17. Then, a signal that has passed through a filter having a predetermined frequency characteristic, for example, a characteristic weighted by the sense of hearing, is detected as noise and applied as a control signal 102 to the excitation unit 18 of the calling means 21. Here, at the same time that the control signal 102 is adjusted so that the level of the ringing tone also rises when the level of noise rises, at the same time the exciter 18 receives the ringing signal and determines a predetermined level immediately before the ringing tone is emitted. The generation level of the ringing tone is controlled by the control signal obtained during the predetermined time (for example, 1 second).

In this way, if the noise around the telephone is loud, the ringing tone becomes small and a ringing tone suitable for articulation can be obtained.

[0009]

This conventional telephone has the following problems.
Since the volume of the ringing bell is automatically adjusted according to the noise level around the telephone, it is possible to generate a ringing ringing sound according to the noise level. Depending on the characteristics, the ringing tone cannot be adjusted based on the volume of the noise measured by changing the setting of the ambient noise measurement period. However, there is a problem that the volume cannot be generated.

[0010]

In the telephone of the present invention, a period setting means for presetting a period for measuring ambient noise corresponding to the change and a period setting means for detecting a ringing signal from a line are preset. Noise volume measuring means for measuring the volume of ambient noise for a set period, ringing bell sound generating means for generating a ringing bell sound corresponding to the ringing signal, and measuring the noise volume to a preset volume of the ringing sound. And a volume control means for controlling the ringing bell sound generating means so as to have a volume added by the volume of the ambient noise measured by the means, while the ringing signal is present and the signal is on-hook.

Further, the telephone of the present invention collects ambient noise by a ringing signal detecting section for detecting a ringing signal from a line, a ringing bell sound generating section for generating a ringing bell sound corresponding to the ringing signal. A sensor, a measurement period setting unit that presets a period for measuring the volume of ambient noise collected by the sensor in response to the change, and a volume measuring unit that measures the volume of the ambient noise collected during the period. And a volume setting unit that presets the volume of the ringing sound when there is no ambient noise,
When the ringing signal is detected, the ringing sound is generated by the ringing sound generator so that the volume of the ambient noise measured by the volume measuring unit and the volume preset by the volume setting unit are added. And a volume control section for controlling the period during the on-hook state.

[0012]

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 present embodiment has an interface section 1 for interfacing with a line 9, a ringing signal detecting section 2 for detecting a ringing signal from the line 9 via the interface section 1, and a ringing corresponding to the ringing signal. Ringing bell sound generator 8 for generating a bell sound, and sensor 3 for collecting ambient noise
And a measurement period setting unit 5 that presets a period for measuring the volume of ambient noise collected by the sensor 3 in response to the change, and measures the volume of ambient noise collected during the preset period. The volume measuring unit 4, the volume setting unit 6 that presets the volume of the ringing sound when there is no ambient noise, and the ambient noise volume and the volume setting unit 6 that are measured by the volume measuring unit 4 when the ringing signal is detected. A volume control section 7 is provided for controlling the ringing tone generation section 8 so that the volume is a sum of a preset volume and a ringing signal when there is a ringing signal.

Next, the operation of this embodiment will be described.

The volume of the ringing bell sound generator 8 in the absence of ambient noise is preset to No (db) from the volume setting unit 6. Further, the period for measuring the volume of the ambient noise is preset from the measurement period setting unit 5 to, for example, n (seconds) in consideration of the change in the ambient noise.

When the ringing signal detecting section 2 detects the ringing signal from the line 9 through the interface section 1, the volume measuring section 4 collects the sound by the sensor 3 for n (seconds) preset by the measurement period setting section 5. Measure the volume of ambient noise. If the volume at this time is Nn (db), for example, this Nn (db)
Is sent to the volume controller 7.

The volume controller 7 has a preset volume N
The ringing sound generator 8 is controlled so that the volume N (db) = Nn + Nb, which is the sum of the volume o (db) and the volume Nn (db) of the ambient noise, is obtained.

The ringing sound generator 8 rings the ringing sound at a volume of N (db). The volume control unit 7 is the interface unit 1.
When the off-hook state of the handset (not shown) is detected from, the control for the ringing bell sound generation unit 8 is stopped, and the ringing bell sound generation unit 8 stops sending the ringing bell sound.

Further, the volume control section 7 suspends the control for the ringing tone generation section 8 if there is no detection signal from the ringing signal detection section 2 even when the handset is on-hook.

[0021]

As described above, according to the present invention, the period setting means for presetting the period for measuring the ambient noise corresponding to the change and the period setting means for detecting the ringing signal from the line are preset. Noise volume measuring means for measuring the volume of ambient noise for a period, ringing bell sound generating means for generating a ringing bell sound corresponding to the ringing signal, and noise volume measuring means for measuring a preset ringing sound volume By providing the ringing tone generation means with a volume control means for controlling the duration of the ringing signal and the on-hook state so as to be a volume obtained by adding the volume of ambient noise, a ringing tone suitable for the environment of use can be obtained. It is possible to eliminate the bell noise at a louder volume than necessary, and to avoid the inconvenience that the ringing bell sound is too small to be heard.

Particularly, in the period setting means, the characteristics of ambient noise,
Since the measurement period can be set in accordance with the change, it is possible to generate a ringing ringing sound having a more appropriate volume as compared with the conventional case.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a conventional example.

[Explanation of symbols]

 1 interface section 2 ringing signal detection section 3 sensor 4 volume measuring section 5 measurement period setting section 6 volume setting section 7 volume control section 8 ringing tone generation section 9 line

Claims (2)

[Claims] 1. A period setting means for presetting a period for measuring ambient noise corresponding to the change, and a volume of ambient noise for a preset period by the period setting means when a ringing signal from a line is detected. Noise volume measuring means, ringing bell sound generating means for generating ringing bell sound corresponding to the ringing signal, and volume of the ambient noise measured by the noise volume measuring means at a preset volume of the ringing bell sound. And a sound volume control means for controlling the ringing bell sound generating means so that the sound volume is obtained by adding the ringing signal to the ringing sound. 2. A ringing signal detecting section for detecting a ringing signal from a line, a ringing bell sound generating section for generating a ringing bell sound corresponding to the ringing signal, and a sensor for collecting ambient noise.
A measurement period setting unit that presets a period for measuring the volume of ambient noise collected by this sensor in response to the change, a volume measuring unit that measures the volume of the ambient noise collected during the period, and A volume setting unit that presets the volume of the ringing sound when there is no ambient noise, a volume of the ambient noise measured by the volume measuring unit when the ringing signal is detected, and the preset volume that is set by the volume setting unit. And a sound volume control unit for controlling the ringing bell sound generation unit for a period of the ringing signal and the on-hook state so that the sound volume is a sum of the sound volume and the sound volume.