JPS646830A - Range switching device for sound pressure meter - Google Patents

Range switching device for sound pressure meter

Info

Publication number
JPS646830A
JPS646830A JP62162730A JP16273087A JPS646830A JP S646830 A JPS646830 A JP S646830A JP 62162730 A JP62162730 A JP 62162730A JP 16273087 A JP16273087 A JP 16273087A JP S646830 A JPS646830 A JP S646830A
Authority
JP
Japan
Prior art keywords
sound pressure
amplifier
pressure range
switching device
pressure meter
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
JP62162730A
Other languages
Japanese (ja)
Inventor
Takehiro Ishikawa
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP62162730A priority Critical patent/JPS646830A/en
Publication of JPS646830A publication Critical patent/JPS646830A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To set the best sound pressure range whatever sound pressure signal is inputted by adding an automatic controller for a sound pressure range. CONSTITUTION:The output of a microphone amplifier 1 is inputted to an A-D converter driver 12 through a variable amplifier 2, a detecting circuit 3, a logarithmic amplifier 4, and an inverting amplifier 5. A bias correcting circuit 11 corrects a sound pressure signal amplified by the variable amplifier 2. Comparators 7 and 8 device whether or not the sound pressure signal is within a specific sound pressure range and an up/down counter 6 switches the sound pressure range according to the decision result.
JP62162730A 1987-06-30 1987-06-30 Range switching device for sound pressure meter Pending JPS646830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62162730A JPS646830A (en) 1987-06-30 1987-06-30 Range switching device for sound pressure meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62162730A JPS646830A (en) 1987-06-30 1987-06-30 Range switching device for sound pressure meter

Publications (1)

Publication Number Publication Date
JPS646830A true JPS646830A (en) 1989-01-11

Family

ID=15760179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62162730A Pending JPS646830A (en) 1987-06-30 1987-06-30 Range switching device for sound pressure meter

Country Status (1)

Country Link
JP (1) JPS646830A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011117948A (en) * 2009-10-26 2011-06-16 Fluke Corp System and method for fetching vibration data

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011117948A (en) * 2009-10-26 2011-06-16 Fluke Corp System and method for fetching vibration data

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