I placed all the cartridges on the front side of an aluminum tube, which had an inner diameter of 7mm, an outer diameter of 10mm, and a length of about 10cm. The purpose of this modification is the reduction of the microphone distortion at high SPL levels. I investigate how a cheap microphone cartridge compares with a high precision, high price (at least for the audio amateur) The article is divided into two parts: first, I tested the microphones as provided by the manufacturer, and, second, I modified the Panasonic microphones according to Mr. I had ordered the units used for testing from Digi-Key (part number P9925-ND) at the end of This article presents the results of these tests. I recently had access to a high precision Bruel & Kjaer Sound Level Meter type 2230 equipped with a ½ pre-polarized condenser microphone type This gave me the opportunity to test the Panasonic WM-61A omnidirectional back electret microphone cartridge. 1 Tube, Solid State, Loudspeaker Technology Article prepared for Testing Panasonic s WM-61A Mike Cartridge By George Danavaras This microphone study measures how distortion affects performance.
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