Flexible and Transparent Piezoelectric Loudspeakers Based on Vertically Aligned PZT and Graphene Nanoplatelets

Researchers at Purdue University have developed new flexible and transparent loudspeakers by combining vertically aligned lead zirconate titanate (PZT) and graphene nanoplatelets in a polymer matrix. Current technologies utilize magnets and cone-shaped diaphragms to project sound, which is often expensive and unreliable. The method created by Purdue researchers includes a simple, lightweight, and cost-effective assembly. In testing, the new loudspeaker has improved sound frequency up to 2000 Hz, sound pressure level up to 80 dB, and light transmission up to 2200 nm. The loudspeaker system can be easily integrated into automotive, aeronautic, military/defense, television, e-reading applications and as sensors for measuring vibrations.

Advantages:

-Sound quality

-Light-weight

Potential Application:

-Automotive

-Aerospace

-Military/Defense

-E-reading

-Television

TRL: 6

Intellectual Property:

Keywords: flexible transparent loudspeakers, lead zirconate titanate, PZT, graphene nanoplatelets, polymer matrix, acoustic actuator, magnet-free, thin film loudspeaker, piezoelectric ceramic, cost-effective assembly, Light-Weight, Mechanical Engineering, Micro & Nanotechnologies, Portable, Roll-to-Roll, Sensors, Sonication, Sound Modulation, wearable