Work

A thin-film photoacoustic speaker based on carbon nanocoils

Year: 2025

Type: article

Abstract: Miniature speaker devices based on the thermoelastic principle with nanomaterials are regarded as promising alternatives to conventional speakers. Most prominently, photoacoustic speakers have attracted increasing attention in recent years owing to their favorable frequency response and uniform thermal distribution. Herein, by considering carbon nanocoils (CNCs) as an excellent photoacoustic wave-producing material due to their exceptionally low specific heat capacity, we designed a thin-film CNC-PDMS photoacoustic speaker. When illuminated by a 4 W LED optical beam, the speaker achieves a 70 dB audible pressure at a measuring distance of 10 cm. Moreover, the speaker enables the high-quality reproduction of arbitrary audio waveforms, including both speech and music, thereby demonstrating its potential to be developed for a specific advanced speaker.

Source: Sensors and Actuators A Physical

DOI: 10.1016/j.sna.2025.117209

Authors: Chong Qin, Hui Fang

Institution: Shenzhen University

Language: English

Topic: Acoustic Wave Phenomena Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750

Funders: National Natural Science Foundation of China, Shenzhen University, Shenzhen Science and Technology Innovation Program