ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06

1pNS14. Studies of source--load interaction in a duct system using acoustic noise synthesis.

Anilkumar Bhate

M. G. Prasad

Noise and Vib. Control Lab., Dept. of Mech. Eng., Stevens Inst. of Technol., Castle Point on the Hudson, Hoboken, NJ 07030

Acoustic noise synthesis (ANS) for duct systems was first developed by the authors (M. G. Prasad and T. V. Ananthapadmanabha, INTER-NOISE 89 Proceedings) based on the principles of speech synthesis using a source-filter model. The ANS allows the designer of a duct system to simulate the perceptual quality of the acoustical output of the system. The ANS is based on the transfer function which is evaluated using the known geometry of the duct system. The present work describes the application of ANS to study the interaction between source and load on the perceptual quality of a duct system acoustic output. An electroacoustic driver as a source and ducts of various lengths are used as loads. Good results are obtained which validate the application of acoustic noise synthesis in design of duct systems with emphasis on the perceptual quality and subjective evaluation.