Abstract: A microphone enhancing device combines an automatic gain control, a band-limited compressor, and a gate in one very compact package that is small enough and efficient enough to plug into or be wired into the base of almost any microphone. A connector is provided on the device for removably connecting an infrared sensor directed parallel to the microphone. For gooseneck microphones the infrared sensor is also on a gooseneck. Low frequency tones are attenuated irrespective of attenuation of higher tones when a present audio level indicates that a speaker is too close to the microphone; this reduces proximity effect produced by microphones.

Abstract: A probe used in deep brain stimulation includes a cannula comprising an elongated housing defining an internal aperture and having a base portion with a notch, the housing having a longitudinal axis, and an electrode configured to be inserted through the aperture of the cannula. The electrode and notch are configured such that the electrode will contact the notch when inserted in the cannula and be directed out of the cannula at a non-zero angle relative to the longitudinal axis of the housing.

Abstract: An emulation circuit includes a digital signal processor with a digital filter controlled by frequency response conversion parameters for converting a standard microphone signal into a signal emulating the frequency response of one of a plurality of microphones selected by a selector connected to the digital signal processor. Optionally the conversion parameters can also include phase response conversion parameters. The emulation circuit can be included in a receiver for a wireless microphone or in a microphone itself.

Abstract: An emulation circuit includes a digital signal processor with a digital filter controlled by frequency response conversion parameters for converting a standard microphone signal into a signal emulating the frequency response of one of a plurality of microphones selected by a selector connected to the digital signal processor. Optionally the conversion parameters can also include phase response conversion parameters. The emulation circuit can be included in a receiver for a wireless microphone or in a microphone itself.

Abstract: A holder for a wireless microphone includes a pair of terminals electrically connected to a power supply and mounted in a recess of a holder member for engaging corresponding terminals on an elongated handle body of the wireless microphone. In one embodiment, the holder includes an axially offset opening, a rib, a groove or other orienting provision form mating with a corresponding axially offset protrusion, a groove, a rib or other mating orienting provision on the microphone handle body to ensure engagement of the microphone terminals with the holder terminals. In another embodiment, first terminals of the microphone and holder terminals are axially centered and second terminals of the microphone and holder terminals are offset from the axis with one of the second terminals being annular.