APPLICATIONS OF TECHNOLOGY:
- Speaker (earbud, compact, high-intensity, speaker array)
- Microphone (compact, microphone array)
- Radar source and/or receiver
- Positional sensor
- Acoustic camera
- Enables smaller devices
- Offers broad frequency response
Membranes of 2D materials (e.g., graphene, other 2D material) have demonstrated wide-band frequency response in the audio and ultrasonic frequencies, for example in Berkeley Lab’s Electrostatic Graphene Loudspeaker and Ultrasonic Radio.
A research team led by Alex Zettl has developed post-synthesis techniques for altering a membrane’s mechanical properties to tune its frequency, bandwidth, amplitude, or directionality (broadcasting or receiving audio signal in a specific direction). This technology further enables small speakers and microphones, developed using the Zettl team’s portfolio, with broad frequency response.
DEVELOPMENT STAGE: Proven principle.
STATUS: Patent pending. Available for licensing or collaborative research.
SEE THESE OTHER BERKELEY LAB TECHNOLOGIES IN THIS FIELD: