Abstract: An earphone device capable of achieving sound bandwidths beyond the 150-7000 Hz wideband range, and configured for supra-concha or supra-aural placement. The earphone comprises at least two frequency range receivers positioned within a housing. In at least one embodiment, the earphone is capable of achieving a super-wideband range by physically combining a low frequency receiver and a high frequency receiver in a space-efficient and acoustically advantageous manner.

Abstract: An automotive microphone assembly. According to one embodiment of the present invention, the assembly comprises a first microphone, a second microphone, a connection means, and a housing. The connection means provides for electrical connection to the first and second microphones, and for connection to a first automotive subsystem and a second automotive subsystem, respectively. The first subsystem and second subsystem may comprise a telephony subsystem, speech recognition subsystem, speech recording subsystem, intercom subsystem, noise control subsystem, noise compensation subsystem, or noise monitoring subsystem. By use of the assembly of the present invention, a single microphone assembly may be used in support of multiple automotive subsystems, thereby saving space in the automobile and realizing costs savings in having a single assembly. In addition, the assembly is comprised of reasonably priced components, is easy to assemble, and permits for repair or replacement of the assembly or components thereof.

Abstract: A system and method for RF immunity of an electret condenser microphone. In one embodiment, the microphone comprises a printed wire board, an amplifier, a capacitor. The amplifier and the capacitor are mounted on the printed wire board such that longitudinal axis, i.e., the axis defined by the line between the output pin and the ground pin, of the capacitor is perpendicular to the longitudinal axis of the amplifier. According to one embodiment of the method of the present invention, an electret condenser microphone according to the present invention is provided, and current is provided to the capacitor to result in the creation of a magnetic field about the longitudinal axis of the capacitor. The magnetic field created is positioned such that it does not significantly contribute to the generation of RF current in the amplifier.