Welcome to Wave Science Study since 2012 April.
Dr. Mikio Tohyama

Y. Hirata and S.Goto
"Pictorial of Sounds,"
Time-frequency properties of tones played by musical instruments are shown. Samples from the University of Iowa Musical Instruments Samples (MIS) were used.
These samples were analyzed by the non-harmonic Fourier analysis (SFA). The time resolution is 16ms and the frequency resolution 1Hz.
No.1 No.2
2015 March.
Original wave form data are from

Mikio Tohyama, "Waveform Analysis of Sound," Springer.com, Jan. 2015.

Y. Hara, Y. Takahashi, K. Miyoshi, Narrow-band envelope spectral analysis close to sound source (in Japanese). J. Inst. Elect. Inf. Comm. Eng. Jpn. J97-A(3), 221–223 (2014)

Satoru Goto, Yoshinori Takahashi, Mikio Tohyama, "Structural Vibration Monitoring Using Cumulative Spectral Analysis," Hindawi Publishing Corpotration, Advances in Acoustics and Vibration, Vol.2013, Article ID 158329, 7 pages.

Satoru Goto, Yoshinori Takarhashi, Mikio Tohyama, "Autocorrelation Analysis in Time and Frequency Domains for Passive Structural Diagnostics",
Hindawi Publishing Corpotration, Advances in Acoustics and Vibration, Vol.2013, Article ID 204878, 8 pages.

Y. Hara, M. Tohyama, K. Miyoshi, Effects of temporal and spectral factors of maskers on speech intelligibility. Appl. Acoust. 73, 893–899 (2012)

Tomomi Hasegawa, Mikio Tohyama, "Analysis of Spectral and Temporal Waveforms of Piano-String Vibration," J. Audio Eng. Soc., Vol. 60, No. 4, pp. 237-245, 2012 April.

Tomomi Hasegawa, Mikio Tohyama, "Separation of zeros for source signature identification under reverberant path conditions," J. Acoust. Soc. Am., Vol.130, No.4, EL271-EL275, Oct. 2011.

Tomomi Hasegawa, Mikio Tohyama, "Source signature identification by using pole/zero modeling of transfer function. Inter Noise 2011, 431616 (2011).

Mikio Tohyama, "Sound and Signals," Springer.com, July 2011.

Research activities
Reseach consulting firm:  Wave Science Study(WSS)

Fellow, Inst. Elec. Inf. Comm. Engineers, Japan
Member, Acoust. Soc. Japan