Scientists study caterpillar hearing in ultraquiet chamber to inform microphone design

Scientists at the University of Cambridge have identified a previously unknown auditory mechanism in the larvae of the silk moth, revealing that caterpillars can detect sound through a network of microscopic hairs on their bodies. The discovery, detailed in a paper published in *Nature Communications*, shows that the hairs vibrate in response to airborne pressure waves, converting them into neural signals that the insects use to avoid predators. High‑resolution imaging and electrophysiological recordings confirmed that the hairs function as highly sensitive acoustic receptors, a capability that had not been documented in any lepidopteran species until now.

The findings have immediate implications for acoustic engineering, as the biological design offers a blueprint for ultra‑compact, low‑power microphones. By mimicking the caterpillars’ hair‑based transducers, engineers could develop sensors that capture sound with greater fidelity while occupying a fraction of the space required by conventional diaphragms. Researchers anticipate that integrating these bio‑inspired structures into consumer electronics and hearing‑aid devices could enhance performance and reduce manufacturing costs, marking a significant step toward nature‑driven innovation in audio technology.