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The microphone arm of headsets may carry an external microphone or be of the voice tube type. External microphone designs have the microphone housed in the front end of the microphone arm. Voicetube designs are also called internal microphone design, and have the microphone housed near the earpiece, with a tube carrying sound to the microphone.
The internal electronic circuitry of an active noise-canceling mic attempts to subtract noise signal from the primary microphone. The circuit may employ passive or active noise canceling techniques to filter out the noise, producing an output signal that has a lower noise floor and a higher signal-to-noise ratio .
The Shure SM58 is a professional cardioid dynamic microphone, commonly used in live vocal applications. Produced since 1966 by Shure Incorporated , it has built a reputation among musicians for its durability and sound, and is still the industry standard for live vocal performance microphones.
Extra features: Many hearing aids offer additional features such as rechargeable batteries, directional microphones, wind noise reduction, extended battery life, and advanced noise cancellation ...
As with directional microphones, the polar pattern for an "omnidirectional" microphone is a function of frequency. The body of the microphone is not infinitely small and, as a consequence, it tends to get in its own way with respect to sounds arriving from the rear, causing a slight flattening of the polar response.
2007: DPA Microphones received the prestigious award King Frederik IX award [59] 2006: WFX Best New Product Award - SMK4061 Stereo Microphone Kit With Miniature Microphones [60] 2004: TEC Award nominee - 4088 Directional Headset Microphone [61] 2002: TEC Award nominee: 4066 Omnidirectional Headset Microphone [62] [63]
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