Single-layer graphene sound-emitting devices: experiments and modeling.
Single-layer graphene (SLG) was demonstrated to emit sound. The sound emission from SLG had a significant flat frequency response in the wide ultrasound range from 20 kHz to 50 kHz. SLG can produce a sound pressure level (SPL) as high as 95 dB at a distance of 5 cm with a sound frequency of 20 kHz. The SPL value is among the highest reported to date for sound-emitting devices (SEDs) based on the thermoacoustic effect. A theoretical model was established to analyze the sound emission from SLG. The theoretical results are in good agreement with the experimental results. Conventional acoustic devices with a large size can be reduced to the nano-scale by using this novel SLG-SED material. It has the potential to be widely used in speakers, buzzers, earphones, ultrasonic transducer, etc.
Institute of Microelectronics, Tsinghua University, Beijing, 100084, China.
He
H
Tian
Dan
D
Xie
Yi
Y
Yang
Tian-Ling
TL
Ren
Yu-Feng
YF
Wang
Chang-Jian
CJ
Zhou
Ping-Gang
PG
Peng
Li-Gang
LG
Wang
Li-Tian
LT
Liu
D003198:Computer Simulation; D004867:Equipment Design / Q000379:methods; D006108:Graphite / Q000138:chemical synthesis* / Q000737:chemistry*; D008954:Models, Biological; D013016:Sound; D013055:Spectrophotometry, Infrared; D014465:Ultrasonics / Q000295:instrumentation*
D006108:Graphite