JPS5582021A - Automatic tester for sound volume - Google Patents

Automatic tester for sound volume

Info

Publication number
JPS5582021A
JPS5582021A JP14686978A JP14686978A JPS5582021A JP S5582021 A JPS5582021 A JP S5582021A JP 14686978 A JP14686978 A JP 14686978A JP 14686978 A JP14686978 A JP 14686978A JP S5582021 A JPS5582021 A JP S5582021A
Authority
JP
Japan
Prior art keywords
propriety
bell
sound
drawer
judgement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14686978A
Other languages
Japanese (ja)
Inventor
Yutaka Takano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14686978A priority Critical patent/JPS5582021A/en
Publication of JPS5582021A publication Critical patent/JPS5582021A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To enable to test the sound of bell of telepbone set, especially large amount of tested sound producing bodies, automatically, quickly and accurately.
CONSTITUTION: When a bell on assembling line comes near the test unit, the operator picks up it, mounts it in the drawer, and the start button on the operation panel is depressed. The drawer is contained in the sound proof box, and the drive section 10 produces the signal in a given frequency and voltage under the predetermined bell drive conditions to activate the bell. After this sound is detected with the microphone 3 and converted into a voltage, it is inputted to the preamplifier via the switch 7 and converted into DC at the rectifying circuit 6. The output of rectifier is made to logarithm with the logarithmic amplifier 8, compared with the reference voltage at the propriety judgement circuit 9 for the judgement of propriety. The result of the propriety is given to the control section 12 to illuminate the propriety lamp on the operation panel. At the same time, the drive of the moving mechanism is started, the drawer is drawn out from the sound proof box, and a series of propriety judgement test is finished.
COPYRIGHT: (C)1980,JPO&Japio
JP14686978A 1978-11-28 1978-11-28 Automatic tester for sound volume Pending JPS5582021A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14686978A JPS5582021A (en) 1978-11-28 1978-11-28 Automatic tester for sound volume

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14686978A JPS5582021A (en) 1978-11-28 1978-11-28 Automatic tester for sound volume

Publications (1)

Publication Number Publication Date
JPS5582021A true JPS5582021A (en) 1980-06-20

Family

ID=15417398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14686978A Pending JPS5582021A (en) 1978-11-28 1978-11-28 Automatic tester for sound volume

Country Status (1)

Country Link
JP (1) JPS5582021A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147937U (en) * 1985-03-07 1986-09-12

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913084A (en) * 1973-03-26 1975-10-14 Wisconsin Alumni Res Found Noise quality detector for electric motors or other machines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913084A (en) * 1973-03-26 1975-10-14 Wisconsin Alumni Res Found Noise quality detector for electric motors or other machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147937U (en) * 1985-03-07 1986-09-12

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