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

1pNS12. Acoustical studies of a duct system using a power flow model.

Woo-sung Kim

HDD Design Eng., Samsung Electronics Co., Ltd., 416, Maetan-3Dong, Paldal-Gu, Suwon City, Kyungki-Do, Korea

M. G. Prasad

Stevens Inst. of Technol., Hoboken, NJ 07030

Any duct system from an acoustical point of view can be modeled as a source--load system. The power flow analysis in a source--load system is important for a system's acoustical design. The present work describes the development of a power flow model utilizing the source and load impedances as parameters. Also, the source is described in terms of its power rather than the pressure or the volume velocity. The study includes both analytical and experimental work. The analytical work deals with the development of expressions for power flow in the system. The experimental work is carried out using an Altec electroacoustic driver as the source and various ducts as the loads. The system performance is evaluated using the power flow model for various loads. The study has yielded good results validating the power flow model for duct systems.