1. (1) J. Ohga : “Brief history of microphones: Focusing consumer use microphones”, J. acoust. soc. jpn, Vol. 64, No. 11, pp. 650-655 (2008) (in Japanese)
2. (2) K. Tanaka, G. Nogami, and Y. Sonoda : “Measurement of Audible Acoustic Wave by Laser Light”, IEEJ Trans. EIS, Vol. 122-E, No. 7, pp. 362-368 (2002) (in Japanese)
3. (3) Y. Ikeda, M. Goto, N. Okamoto, T. Takizawa, Y. Oikawa, and Y. Yamasaki : “A measurement of reproducible sound field with laser computed tomography”, J. acoust. soc. jpn, Vol. 62, No. 7, pp. 491-499 (2006) (in Japanese)
4. (4) Y. Sonoda : “Investigation of optical system for direct detection of audio-wave by optical Fourier transform”, J. acoust. soc. jpn, Vol. 62, No. 8, pp. 571-579 (2006) (in Japanese)
5. (5) D. Mizushima, T. Yoshimatsu, K. Goshima, N. Tsuda, and J. Yamada : “Sound Detection by Laser Microphone Using Self-coupling Effect of Semiconductor Laser”, IEEJ Trans. EIS, Vol. 136-C, No. 7, pp. 1021-1026 (2016) (in Japanese)