Measuring and testing – Vibration – Resonance – frequency – or amplitude study
Reexamination Certificate
2007-07-31
2007-07-31
Kwok, Helen (Department: 2856)
Measuring and testing
Vibration
Resonance, frequency, or amplitude study
C073S586000, C381S058000
Reexamination Certificate
active
10537984
ABSTRACT:
A device for detecting a resonant frequency comprises a sound source, a switch, a mixer, and a sound meter. The switch and mixer are capable of switching between a first state in which the switch and mixer output a measurement signal and a second state in which the switch and mixer output a synthesized signal containing the measurement signal and the signal output from a microphone. The device detects the resonant frequency based on comparison between the first amplitude frequency characteristic measured in the first state and the second amplitude frequency characteristic measured in the second state.
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International Application No. PCT/JP03/15703International Search Reportby the Japanese Patent Office dated Mar. 9, 2004.
Kwok Helen
Marshall & Gerstein & Borun LLP
TOA Corporation
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