Abstract: A method and an apparatus provides for an optimum musical stringed instrument dynamic force chain comprised of simultaneous axial witness point adjustment mechanism, adjustable truss rod, high energy resilient and low friction tremolo bearing and mechanically optimized inline sensor structure.

Abstract: A system for controlling noise for a sound receiving device directs noise towards the sound-receiving back side of a bi-directional microphone and directs the user's voice away from the back side. The bi-directional microphone is electrically connected to plug adapted for mating with an external microphone input jack of the sound receiving device. A resistor is connected in series with the bi-directional microphone and operates to attenuate the detected sound signal of the bi-directional microphone in order to overcome signal enhancement expedients of the sound receiving device, such as compression and clipping due to for example automatic gain control.

Abstract: An apparatus is disclosed for the cancellation of ambient noise that impinges upon the front surface of a pressure differential microphone means. The apparatus utilizes one or more curved surfaces that act as ambient noise waveform reflectors. The reflectors cause ambient noise to impinge on the back surface of the microphone. In addition, the reflectors deflect a speaker's voice which is directed toward the front surface of the microphone to be deflected away from the back surface of the microphone.

Abstract: An apparatus for noise cancellation of ambient noise impinging upon the front surface of a pressure differential microphone on the end of a boom. The apparatus utilizes curved reflectors to cause ambient noise which impinges on the front surface of the microphone to also impinge on the back surface of the microphone. In addition, the curved reflectors cause a talker's voice which is directed toward the front surface of the microphone to be deflected away from the back surface of the microphone.

Abstract: This is a method and an apparatus that provides string bearings (32) and constant inter string pitch correction and pitch trajectory control tremolo device (64 or 80) for a stringed musical instrument (12). The string bearings (32) allow the strings (18) of the instrument to move freely in the axial direction and to be guided with high stiffness in the radial direction. The string bearings contain low axial friction and high radial stiffness bearing inserts (40) whose surface supports the strings to provide the witness points of nuts, bridges, frets, and finger boards. The material of preference for the string bearing inserts (40) is one of the highest energy resiliency and stiffness and the lowest friction. The string bearings and their inserts are adjustable (32, 56, 42, 58) or fixed position. Adjustments are in the horizontal, vertical, and axial (46, 50, 48) directions or any combination thereof. The constant inter string pitch correction and pitch trajectory control tremolo device (64 or 80 in FIG.