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method and device for determining a gewebecharakteristik using reflection broadband untraschallpulse, transfer of the echofrequenzspektrums in the hoerbereich and diagnostics using the gehoers.
method and device for determining a gewebecharakteristik using reflection broadband untraschallpulse, transfer of the echofrequenzspektrums in the hoerbereich and diagnostics using the gehoers.
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机译:反射宽带非脉动脉冲确定回波频率的方法和设备,霍尔伯里奇回声频率的传递以及使用回波频率的诊断。
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摘要
The device consists of circuits (1-2-3) for transmitting high frequency ultrasonic carrier pulses to the tissue, circuits (1-4) for receiving the echoes and converting them into high frequency electrical signals, and circuits (5-6-10-11-14) for memorizing the said electrical signals with a sampling frequency that is high enough for the high frequency information they contain to be correctly recorded. Circuits (11 to 19) read the memorized information at a rate lower than the sampling frequency so that the high frequency spectrum is transposed to the audible frequency range. Circuits (7-8-9) then convert the transposed spectrum into an audible signal. …IMAGE…
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