国家/地区 美国（2）
IPC部 H（2）
IPC大类 H04（2）
IPC小类 H04R（2）
IPC H04R019/00（2）
发明人 ZETTL A K（2）
公开年
申请年
专利权人 UNIV CALIFOR.（2）

System for transmitting and receiving ultrasonic sound has receiver with graphene membrane having single layer or multiple layers of two-dimensional material and receiver that receives sound waves in ultrasonic frequency range.

ZHOU Q, ZETTI A K, ZETTL A K

Electrostatically driven graphene speaker for generating broadband audio, has first and second electrodes which are proximate circular portion of graphene member defined by circular open regions of first and second frames.

ZHOU Q, ZETTL A, ZETTL A K