Knowles' TM series microphones are comparable in performance to the standard EM series, but are 20% smaller. TM can also be used as a matched omnidirectional pair for directional applications. Features include a rugged structure to withstand harsh environmental conditions, high mechanical shock resistance, improved RFI and EMI suppression, undamped, shielded and internal damped response, Numerous port positions, a wide range of available frequency responses, and the extended housing TM microphone can also improve sensitivity / noise in the same footprint, and a custom corner frequency via an electronic high-pass filter can optimize low-frequency noise performance to meet Required matching and targeting applications.