Study on the thermo-acoustic emission from a carbon nanotube stripe

Carbon nanotube (CNT) was demonstrated to show a great potential as a thermoacoustic (TA) material. It can be used to fabricate novel TA loudspeaker free of magnets and moving parts, a promising device that directly converts thermal energy into acoustic energy. In this paper, the characteristics of TA emission from a CNT stripe are explored by means of parametric analysis. The impacts of the length of stripe, detecting distance and detecting angle on the sound pressure level (SPL) of emitted TA sound are discussed seperately. In addition, the directivity of TA emission from stripe is also investigated. Hence, some phenomena and principles are found and summarized, which would be of guiding significance for the further invegation and development of nanothermophones.