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| SECTION G– PHYSICS |
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| G 01 | MEASURING (counting G 06 M) |
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| G 01 H | MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES (generation of mechanical vibrations without measurement B 06 B, G 10 K; measuring position, direction or velocity of an object G 01 C, G 01 S; measuring quasi-steady pressure of a fluid G 01 L 7/00; determining unbalance G 01 M 1/14; determining properties of material by sonic or ultrasonic waves transmitted therethrough G 01 N; systems using the reflection or reradiation of acoustic waves, e.g. acoustic imaging, G 01 S 15/00; seismology, seismic prospecting, acoustic prospecting G 01 V 1/00; acousto-optical devices per se G 02 F; obtaining records by techniques analogous to photography using ultrasonic, sonic or infrasonic waves G 03 B 42/06; speech analysis or synthesis, speech recognition G 10 L; information storage based on relative movement between record carrier and transducer G 11 B; piezo-electric, electrostrictive or magnetostrictive elements in general H 01 L; manufacture of electromechanical resonators by processes which include measurement of frequency with consequential modification of the resonator H 03 H 3/00; pictorial communication using ultrasonic, sonic or infrasonic waves converted into electric picture-representative signals H 04 N, e.g. H 04 N 5/31) |
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| Notes |
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| (1) | This subclass covers the combination of generation and measurement of mechanical vibrations. |
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| (2) | Attention is drawn to the Notes following the title of class G 01. |
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1/ | 00 | Measuring vibrations in solids by using direct conduction to the detector (G 01 H 9/00, G 01 H 11/00 take precedence) |
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1/ | 04 | . | of vibrations which are transverse to direction of propagation |
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1/ | 06 | . | . | Frequency |
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1/ | 08 | . | . | Amplitude |
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1/ | 10 | . | of torsional vibrations |
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1/ | 12 | . | of longitudinal or not specified vibrations [4] |
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1/ | 14 | . | . | Frequency [4] |
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1/ | 16 | . | . | Amplitude [4] |
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3/ | 00 | Measuring vibrations by using a detector in a fluid (G 01 H 7/00, G 01 H 9/00, G 01 H 11/00 take precedence) |
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3/ | 04 | . | Frequency |
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3/ | 06 | . | . | by electric means |
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3/ | 08 | . | . | Analysing frequencies present in complex vibrations, e.g. comparing harmonics present |
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3/ | 10 | . | Amplitude; Power |
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3/ | 12 | . | . | by electric means (G 01 H 3/14 takes precedence) [2] |
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3/ | 14 | . | . | Measuring mean amplitude; Measuring mean power; Measuring time integral of power [2] |
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5/ | 00 | Measuring propagation velocity of ultrasonic, sonic or infrasonic waves |
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7/ | 00 | Measuring reverberation time (measuring absorption of vibrations in a material G 01 N; arrangements for producing a reverberation G 10 K 15/08) |
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9/ | 00 | Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means |
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11/ | 00 | Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties |
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11/ | 02 | . | by magnetic means, e.g. reluctance [4] |
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11/ | 04 | . | . | using magnetostrictive devices [4] |
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11/ | 06 | . | by electric means [4] |
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11/ | 08 | . | . | using piezo-electric devices [4] |
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13/ | 00 | Measuring resonant frequency |
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15/ | 00 | Measuring mechanical or acoustic impedance [3] |
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17/ | 00 | Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups [4] |
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