Subminiature performance

Wide range of size and performance options
Magnetic, piezo ceramic and electret condenser
Low noise and RF filtering versions

Hundreds of design possibilities can be applied to your product challenge with our high-performance microphone designs. Ideal for new product ideas that require premium audio and very small form factors, solutions include noise canceling, omni-directional and unidirectional performance. Other variables include size, shape, amplification, sensitivity, low noise, and resistance to vibration and mechanical shock.

Parametric search Contact Knowles

Additional Links

Evaluation kits

Select a product category to view features, benefits, documents and performance details

Series	Dimensions	Features
EA series	5.56mm x 3.98mm x 2.21mm (.219in x .157in x .087in)	Rugged construction to withstand severe environmental conditions High resistance to mechanical shock Available with RFI suppression Undamped, screen damped, and internally damped responses Numerous port locations Custom tube diameters and lengths available Wide range of frequency responses
EK/EY series	5.56mm x 3.98mm x 2.21mm (.219in x .157in x .087in)	Rugged construction to withstand severe environmental conditions High resistance to mechanical shock Available with RFI suppression Undamped, screen damped, and internally damped responses Numerous port locations Custom tube diameters and lengths available Wide range of frequency responses
EL series	4.00mm x 5.59mm x 2.28mm (.157in x .220in x .090in)	Unidirectional Integral FET amplifier High electroacoustical sensitivity Low vibration sensitivity Low noise Cardioid and supercardioid responses High rejection of noise from side and rear
EM/BEM series	3.61mm x 3.61mm x 2.21mm (.142in x .142in x .087in)	Rugged construction to withstand severe environmental conditions High resistance to mechanical shock Improved RFI and EMI Undamped, screen damped, and internally damped responses Numerous port locations and a wide range of frequency responses available Extended housing EM microphones are also available, improving sensitivity/noise in the same footprint Custom corner frequencies achieved through electrical high pass filter optimize noise performance at low frequencies for demanding matching and directional applications BEM offers improved Power Feedthrough Attenuation, improved settling time, and electrical high pass filter
FG/BFG series	2.59mm dia. x 2.59 mm (0.102in dia. x 0.102in)	Small size is ideal for multiple applications Rugged High resistance to mechanical shock Exceptionally low vibration sensitivity Various responses available Integral RFI suppression BFG offers improved Power Feedthrough Attenuation, improved settling time, and electrical high pass filter Custom corner frequencies achieved through electrical high pass filter optimize noise performance at low frequencies for demanding matching and directional applications
GA series	2mm x 2mm x 4mm	Compact size providing superior fit rates (2mm x 2mm x 4mm) Excellent sensitivity and noise performance for package Integral RFI suppression Exceptionally low vibration sensitivity Multiple acoustic port placement versions
NR series	4.00mm x 5.59mm x 2.28mm (.157in x .220in x .090in)	Noise Canceling Integral FET amplifier Diaphragm responds to pressure differential giving high rejection of background noise Small size Withstands severe environmental conditions Low vibration sensitivity High electoacoustical sensitivity