JPH0467831U

JPH0467831U -

Info

Publication number: JPH0467831U
Application number: JP11054690U
Authority: JP
Priority date: 1990-10-24
Filing date: 1990-10-24
Publication date: 1992-06-16

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すブロツク図、
第２図は呼鈴音量制御曲線の例示図、第３図は周
囲音量測定から呼鈴音出力までのタイミング図、
第４図は従来の電話機のブロツク図、第５図は従
来の電話機の呼鈴音出力のタイミング図である。１……電話機本体部、２……電話回線、３……
呼鈴信号発生回路、４ａ……増幅回路、６……ス
ピーカ、７……マイクロフオン、８……周囲音量
測定回路、９，１０……可変抵抗器、１１……呼
鈴音量制御回路。 FIG. 1 is a block diagram showing an embodiment of the present invention.
Figure 2 is an example diagram of a doorbell volume control curve, Figure 3 is a timing chart from ambient volume measurement to output of the doorbell sound,
FIG. 4 is a block diagram of a conventional telephone set, and FIG. 5 is a timing diagram of a ring tone output of the conventional telephone set. 1...Telephone body, 2...Telephone line, 3...
Doorbell signal generation circuit, 4a...Amplification circuit, 6...Speaker, 7...Microphone, 8...Ambient sound volume measurement circuit, 9, 10...Variable resistor, 11... Doorbell volume control circuit.

Claims

[Scope of Claim for Utility Model Registration] A doorbell signal generation circuit that receives an incoming call signal and generates a doorbell signal, an amplifier circuit that amplifies the doorbell signal, and an output that outputs the doorbell signal amplified by the amplifier circuit as a doorbell sound. A telephone set comprising: a sound collection means for collecting ambient sound of the telephone; an ambient sound volume measuring means for converting the surrounding sound obtained by the sound collection means into a sound pressure level; and a telephone set according to the sound pressure level. A telephone set comprising: a ring volume control means for setting the amplification circuit to an amplification factor set and stored in advance.