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Sony ECM-322BMP Omnidirectional Earset Microphone

The ECM-322BMP is an earset condenser for people who talk for a living: seminars, conferences, lectures and training rooms. The element weighs about 10 grams without connectors and sits on a supplied headband, close enough to the mouth that room reflection stops being the dominant sound, which is what makes it hold up in a live, hard-surfaced meeting space where a lavalier struggles.

The capsule is omnidirectional with a 50 Hz to 18 kHz response, so head turns do not chop the level, and it handles 115 dB SPL before it complains. It runs on 2 to 10 V DC and terminates in Sony's BMP-type 3.5 mm three-pole mini plug, matching the UWP and UWP-D bodypacks. A clip and a carrying case ship with it.

Capsule TypeElectret Condenser
Frequency Response50 Hz to 18 kHz
DirectivityOmni-directional
Sensitivity-42 dB (7.91 mV) +/-3 dB
Output Impedance1.4k ohms+/-30%, Unbalanced
Maximum Input Sound Pressure Level115 dB SPL
ConnectorBMP type, supplied with 3.5 mm 3-pole mini plug
Mic Cable3.9 feet 1.2 m
Power RequirementsDC 2 V to 10 V
MassApprox. 10 g without connectors Approx. 0.4 oz without connectors