... transmitters for optical communication , 182 long - wavelength PIN photo - diodes as laser monitors and optical receivers , 182 short - wavelength PIN diodes for optical communication , 182 surface acoustic wave filters , 183 Oxide ...
A broadband flextensional transducer has recently been incorporated into a portable battery-operated transmitter that can be transported, installed, deployed, and operated by a single person.
... AT&T had written an IRE paper that discussed modulation mathematically. He showed that FM could not reduce the ... transmitters, the receivers for AM-FM-microwave in their most efficient forms. David Sarnoff made billions out of ...
... AT&T Bell Laboratories Acoustics Research Department, says she developed an interest in acoustics while a ... acoustic transmitter. The transmitter is a duct four inches long and one inch in diameter, with two sets of parallel ...
... acoustic properties of speech produced by different speakers , even when ... acoustically distinguishable by the recognizer . Balancing the recognizer's ... transmitters , Panel 2. Other Supporting Speech Technologies ASR is only ...
... transmitter and receiver (photo courtesy of AT&T Archives and History Center). the transmitter when its position was changed and acoustic feedback between transmitter and receiver). The technical problems were of less import in Europe ...
... ATT and BUA images . Although 0.3 to 0.7 MHz may not be the optimal frequency range for the 1 - MHz broadband ultra- sound transducer , it can still generate an ultrasound signal with good strength and signal - to - noise ratio in this ...
... transmitter could transmit an audio- frequency bandwidth of at least 3,750 cycles per second—the necessary radio- frequency bandwidth is exactly twice as much, or 7,500 Hz—and the best transmitters were capable of 5,000 Hz audio (10 kHz ...
... transmitters as well, although AT&T's response to customers (that they could simply purchase time on AT&T's toll ... acoustic innovations. RCA, it- self a product of that patent pool, would also powerfully shape subsequent events ...