LOW FREQUENCY ACOUSTIC PRESSURE MEAUREMENTS BASED ON A FABRY PEROT REFRACTOMETER |
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| A. Rezki, Z. Silvestri, J-P. Wallerand, C. Guianvarc’h, M. Himbert |
- Abstract:
- This paper presents the development, the operating principle, and the experimental results of an innovative technique for the measurement of acoustic pressures in the range of 40 mHz up to 5 Hz. This new measurement technique is based on the use of a Fabry Perot refractometer in which the air density variations related to an acoustic wave can be tracked and determined by measuring the optical frequency variations of a laser locked on a longitudinal mode of the Fabry Perot cavity. This approach covers a wider range in the low and infrasonic frequencies compared to conventional sensors.
- Keywords:
- Fabry Perot; infrasonic pressure; refractometry; optical microphone; opto-acoustic sensor
- Download:
- IMEKO-TC16-2022-008.pdf
- DOI:
- 10.21014/tc16-2022.008
- Event details
- IMEKO TC:
- TC16
- Event name:
- TC16 Conference 2022
- Title:
6th Conference on Pressure and Vacuum Measurement (together with the 24th TC3 Conference on the Measurement of Force, Mass and Torque, the 14th TC5 Conference on the Measurement of Hardness, and the 5th TC22 Conference on Vibration Measurement)
- Place:
- Cavtat-Dubrovnik, CROATIA
- Time:
- 11 October 2022 - 13 October 2022