JPS646830A - Range switching device for sound pressure meter - Google Patents
Range switching device for sound pressure meterInfo
- 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
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.
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)
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 |
-
1987
- 1987-06-30 JP JP62162730A patent/JPS646830A/en active Pending
Cited By (1)
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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