ELECTRIC ACOUSTIC COMMUNICATION INSTRUMENTS

Brand Owner (click to sort) Address Description
FOSTEX FOSTER ELECTRIC CO., LTD. 1-1-109, Tsutsujigaoka, Akishima City; Tokyo 196-8550 Japan ELECTRIC ACOUSTIC AND COMMUNICATION INSTRUMENTS AND EQUIPMENTS-NAMELY, SPEAKER SYSTEMS, LOUD SPEAKERS, MICROPHONES, MICROPHONE STANDS, AMPLIFIERS, STEREO RECEIVERS, RADIO TUNERS, HEADPHONES AND STRUCTURAL PARTS THEREOF;
FOSTEX FOSTER ELECTRIC CO., LTD. 1-1-109, Tsutsujigaoka, Akishima City; Tokyo 196-8550 Japan Electric Acoustic and Communication Instruments and Equipment Such as Tape Recorders; Tape Reproducers; Audio Mixers; Line Mixers; Meter Bridges; Remote Control Switches; Audio Signal Processing Equipment Such as Digital Delays, Graphic Equalizers and Noise Reduction Units, and Structural Parts Thereof;
FOSTEX FOSTEX CORPORATION 2-35, MUSASHINO 3-CHOME AKISHIMA-SHI, TOKYO Japan ELECTRIC ACOUSTIC AND COMMUNICATION INSTRUMENTS AND EQUIPMENTS-NAMELY, SPEAKER SYSTEMS, LOUD SPEAKERS, MICROPHONES, MICROPHONE STANDS, AMPLIFIERS, STEREO RECEIVERS, RADIO TUNERS, HEADPHONES AND STRUCTURAL PARTS THEREOF;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. Acoustic telemetry devices and methods that provide directional detection. In one embodiment, a disclosed acoustic telemetry device comprises at least two acoustic sensors and an electronics module. A first of the acoustic sensors detects a communication signal that propagates along a tubing string in a first direction. A second of the acoustic sensors is configured to detect the communication signal before the first acoustic sensor. The electronics module combines the detection signals from the acoustic sensors to obtain a combined signal that substantially excludes signals propagating in a direction opposite to the communication signal. Such signal suppression may significantly enhance the communication signal's signal-to-noise ratio, thereby increasing channel capacity. The acoustic telemetry device may be configured to support logging while drilling and/or full-duplex communication.