8th International Conference on Spoken Language Processing

Jeju Island, Korea
October 4-8, 2004

An Experimental Method for Measuring Transfer Functions of Acoustic Tubes

Tatsuya Kitamura (1), Satoru Fujita (1), Kiyoshi Honda (1), Hironori Nishimoto (2)

(1) ATR Human Information Science Laboratories, Japan
(2) Japan Advanced Institute of Science and Technology,Japan

This work proposes an experimental method for direct measurement of transfer functions of acoustic tubes. The method obtains a pressure-to-velocity transfer function from measurement of input volume velocity and output pressures of a target tube. Steady sinusoidal waves from 100 Hz to 5 kHz with a 10-Hz increment were used as a source signal. Experimental results compared with transmission line simulations indicate the following: (1) transfer functions obtained from the measurements agree well with those from transmission line simulations; (2) differences between the resonant frequencies obtained from the measurements and simulations with a uniform tube are less than 2.6%. These results show conclusive evidence that the proposed method permits accurate measurements of transfer functions of acoustic tubes.

Full Paper

Bibliographic reference.  Kitamura, Tatsuya / Fujita, Satoru / Honda, Kiyoshi / Nishimoto, Hironori (2004): "An experimental method for measuring transfer functions of acoustic tubes", In INTERSPEECH-2004, 513-516.