Movie S1.

Airborne silk motion recorded by laser vibrometer. The diameter d and length L of the spider silk are 500 nm and 8 mm, respectively. The airborne acoustic signal contains human voice, low-frequency (100–700 Hz) wing beat of insects, and high-frequency (2–10 kHz) song of birds. A shows the waveform of silk motion. B shows the frequency-dependent spectrogram of silk motion. An audio of the airborne silk motion is also included in this movie. The silk motion clearly captures the airborne signal.

Sensing fluctuating airflow with spider silk

Jian Zhou, and Ronald N. Miles

PNAS. 2017. 114:12120-12125 DOI: 10.1073/pnas.1710559114