A Simple, High Sensitive Fiber Optic Microphone Based on Cellulose Triacetate Diaphragm

Hayber Ş. E., Tabaru T. E., Keser S., Saraçoğlu Ö. G.

JOURNAL OF LIGHTWAVE TECHNOLOGY, cilt.36, sa.23, ss.5650-5655, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 36 Sayı: 23
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1109/jlt.2018.2878345
  • Dergi Adı: JOURNAL OF LIGHTWAVE TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5650-5655
  • Anahtar Kelimeler: Fabry-Perot, fiber-optic microphone, polymer diaphragm, PEROT ACOUSTIC SENSOR, SPEECH QUALITY ASSESSMENT, PERCEPTUAL EVALUATION, ITU STANDARD, PESQ
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

We present a high sensitive fiber-optic microphone (FOM) with a wide measuring range based on a cellulose triacetate diaphragm in this work. The average signal-to-noise ratio (SNR) of the proposed FOM is measured 50.86 dB in at the frequency range of 100 Hz-20 kHz. In the same spectrum range, the highest SNR for the 2-kHz frequency under 103.16 mPa acoustic pressure is measured at 72.20 dB with 2 Hz resolution bandwidth, which corresponds to a noise-limited minimum detectable acoustic pressure level of 17.91 mu Pa/root Hz. The proposed sensor has advantages of high sensitivity, low cost, and easy fabrication. According to the assessments based on the obtained results, the FOM can be used for medical spectroscopy, imaging applications, and for long-distance listening and voice recognition in the military-public security.