DOAJ
Open Access
2021
Laser-based comparison calibration of laboratory standard microphones
Randall P. Wagner
Richard A. Allen
Qian Dong
Abstrak
A precision laser-based comparison calibration method for laboratory standard microphones is described that uses reference microphones calibrated by the pressure reciprocity method. Electrical drive current and diaphragm velocity are measured while the microphones are driven as transmitters/sources of sound; the diaphragm velocity is measured using scanning laser Doppler vibrometry. Sensitivities determined using this method display very good agreement with those determined directly by reciprocity for seven such test microphones at 250 and 1000 Hz. At these frequencies, the expanded (coverage factor k = 2) uncertainties of this comparison calibration method for these microphones are ±0.05 dB.
Topik & Kata Kunci
Penulis (3)
R
Randall P. Wagner
R
Richard A. Allen
Q
Qian Dong
Akses Cepat
Informasi Jurnal
- Tahun Terbit
- 2021
- Sumber Database
- DOAJ
- DOI
- 10.1121/10.0005919
- Akses
- Open Access ✓