Knowles TM Series Microphone provides the best combination of performance and size. It boasts
performance comparable to the standard EM series, in a package 20%
smaller. The TM can also be used in directional applications as a
matched omni-directional pair. The BTM is an improved version of the TM
microphone. It offers enhanced PFA performance, as well as power-on
reset and an electrical high pass filter. The BTM is ideal in
directional applications as a matched omni-directional pair. Learn More