- More sensitive than dynamic mikes, these electret condenser microphones promise to capture the subtle nuances of voice.
- Only the best electret microphones rival good DC-polarized units in terms of noise level and quality; electret microphones lend themselves to inexpensive mass-production, while inherently expensive non-electret condenser microphones are made to higher quality.
- This was delayed from the original May 2007 shipping date due as an additional microphone was added; the original three-microphone electret condenser microphone capsules are arranged to allow stereo recording and have user-selectable parameters to allow for either a 90-or 120-degree pickup angle.
- In 1969, Knowles amplifies Neil Armstrong's words from the moon during the Apollo 11 mission with various acoustic products, and In 1971, Knowles introduces first sub-miniature electret condenser microphone . In 1972, Knowles introduced a real-ear simulator product names as KEMAR ( Knowles Electronics Manikin for Acoustics Research ), which left Knowles and become part of a Dennmark company, Gunnar Rasmussen's Acoustic Systems ( G . R . A . S ).