Method and system for measuring a wideband loop sensitivity for an acoustic transducer
AssigneeBroadsound Corporation
InventorsYing-Wei YUAN, Jen-Chih YAO, Fu-Chieh YANG, Wen-Pin LAI
Life of this patent
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Abstract
A method and system is disclosed for measuring a wideband loop sensitivity SL(f) for an acoustic transducer in an acoustic probe. A pulse signal is employed as a wideband reference signal Vr(t); and, in a pulse-echo measurement a corresponding wideband echo signal Ve(t) is obtained. A normalized loop frequency response {circumflex over (X)}(f) for the acoustic transducer is defined as a ratio of a Fourier Transform of the Ve(t) to a Fourier Transform of the Vr(t). A wideband loop sensitivity SL(f) for the acoustic transducer is defined as an absolute square of the {circumflex over (X)}(f) in decibel.
Claims18
A method for measuring a wideband loop sensitivity for an acoustic transducer, the measuring step comprising:
- generating a pulse to create a wideband signal as a reference signal;
- obtaining a wideband reference signal Vr(t);
- and
- obtaining a function {circumflex over (V)}r(f) that is a Fourier Transform of the wideband reference signal Vr(t).
A method for measuring a wideband loop sensitivity for an acoustic transducer, the measuring step comprising:
- generating a wideband acoustic wave from the acoustic transducer;
- obtaining a wideband echo signal Ve(t) after the wideband acoustic wave being reflected from an acoustic mirror;
- and
- obtaining a function {circumflex over (V)}e(f) that is a Fourier Transform of the wideband echo signal Ve(t).
A method for measuring a wideband loop sensitivity for an acoustic transducer, the measuring step comprising:
- generating a pulse to create a wideband signal as a reference signal;
- obtaining a wideband reference signal Vr(t);
- obtaining a function {circumflex over (V)}r(f) that is a Fourier Transform of the wideband reference signal Vr(t);
- generating a wideband acoustic wave from the acoustic transducer;
- obtaining a wideband echo signal Ve(t) after the wideband acoustic wave being reflected from an acoustic mirror;
- obtaining a function {circumflex over (V)}e(f) that is a Fourier Transform of the wideband echo signal Ve(t);
- defining a normalized loop frequency response {circumflex over (X)}(f) for the acoustic transducer as follows:
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A system for measuring a wideband loop sensitivity for an acoustic transducer, comprising:
- a pulse generator electrically coupled to an acoustic transducer for generating a pulse to create a wideband acoustic wave;
- and
- a control unit electrically coupled to the pulse generator.
Dependencies are inferred from the claim text.