Audio Equipment

Infrasonic

The recording of infrasonic (ultra-low frequency) sounds requires the use of a specialized microphone. Some of the available models are relatively expensive "instrumentation" grade devices that are designed for noise and vibration analysis. These generally offer performance down to roughly 1.0 Hz and include models from Larson Davis and Bruel & Kjaer.

There is, however, an affordable, high-quality solution providing you aren't trying to capture sounds much below 4.0Hz. The Earthworks model QTC-1 is a high-performance, low-noise, omnidirectional microphone that is usable down to 4.0Hz ± 1.0dB. It utilizes standard 48-volt phantom power and terminates in a standard 3-pin XLR style connector.