Design and characterization of an enclosed coaxial carbon nanotube speaker
Department of Mechanical Engineering-Engineering Mechanics
Automotive mufflers are heavy, large, and loud at low frequencies. Carbon nanotube (CNT) speakers are solid-state, lightweight, flexible, and capable of handling high temperatures. This makes them suitable as loudspeakers in active exhaust noise cancellation applications. A coaxial CNT speaker designed for active noise control in an exhaust system is developed. Test results for resistance, in-pipe axial sound pressure level, and efficiency are presented. The maximum in-pipe sound pressure level was above 120 dB (re 20 lPa) using 105 W of electrical power. The maximum power efficiency was 0.008%. The weight, dimensions, and sound pressure level of the speaker show promise for active exhaust noise cancellation applications.
The Journal of the Acoustical Society of America
Prabhu, S. M.,
Design and characterization of an enclosed coaxial carbon nanotube speaker.
The Journal of the Acoustical Society of America,
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