Resources Contact Us Home
Sonic direction finder

Image Number 3 for United States Patent #4143351.

1. A direction finding system for determining the direction from which short sonic or ultrasonic pulses are incoming, comprising: a plurality of electroacoustic transducers forming a circular arrangement; electronic means for sequentially switching in and out pairs of diametrically opposed transducers; differential means having two inputs, respectively connected by said electronic means to said switched-in transducers, and an output for providing the differential output signal of each of said pairs; and means for deriving the phase of said output signal.

  Recently Added Patents
Information storage medium, reproducing method, and recording method
Product common object
Device and method for enabling hierarchical quality of service services
Very extremely thin semiconductor package
Magnetic element with enhanced coupling portion
LED backlight driving circuit, liquid crystal display device and driving circuit
Method and system of debugging multicore bus transaction problems
  Randomly Featured Patents
Load capacitance measuring circuit and output buffer adaptive to wide range of load capacitance
Continuously variable automotive transmission
Doped dysprosia discharge vessel
Pulse width modulating device and exposure device
Portion of a chair
Outline extraction using partial image processing
Golf club striking plate with variable bulge and roll
Remote control
Asynchronous immersive communications in a virtual universe
Reset configuration in a data processing system and method therefor