G
SECTION G — PHYSICS
  
INSTRUMENTS
 G01
MEASURING (counting G06M); TESTING
 G01H
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES (generation of mechanical vibrations without measurement B06B, G10, H04R; measuring position, direction or velocity of an object G01C, G01S; transducers per se, see the relevant subclasses, e.g. G01L, H01L, H04R; determining unbalance G01M 1/14; determining properties of material by sonic or ultrasonic waves transmitted therethrough G01N; imaging of objects using sonar G01S 15/00; seismology, seismic prospecting, acoustic prospecting G01V 1/00; acousto-optical devices per se G02F; obtaining records by techniques analogous to photography using ultrasonic, sonic or infrasonic waves G03B 42/06; speech analysis or synthesis, speech recognition G10L; information storage based on relative movement between record carrier and transducer G11B; manufacture of electromechanical resonators by processes which include measurement of frequency with consequential modification of the resonator H03H 3/00; pictorial communication using ultrasonic, sonic or infrasonic waves converted into electric picture-representative signals H04N, e.g. H04N 5/31)  [4]
 G01H

Note(s)

  1. This subclass covers the combination of generation and measurement of mechanical vibrations.
  2. Attention is drawn to the Notes following the title of class G01.
 G01H 1/00
Measuring vibrations in solids by using direct conduction to the detector (G01H 9/00, G01H 11/00 take precedence)
 G01H 1/04
·  of vibrations which are transverse to direction of propagation
 G01H 1/06
·  ·  Frequency
 G01H 1/08
·  ·  Amplitude
 G01H 1/10
·  of torsional vibrations
 G01H 1/12
·  of longitudinal or not specified vibrations  [4]
 G01H 1/14
·  ·  Frequency  [4]
 G01H 1/16
·  ·  Amplitude  [4]
 G01H 3/00
Measuring vibrations by using a detector in a fluid (G01H 7/00, G01H 9/00, G01H 11/00 take precedence)
 G01H 3/04
·  Frequency
 G01H 3/06
·  ·  by electric means
 G01H 3/08
·  ·  Analysing frequencies present in complex vibrations, e.g. comparing harmonics present
 G01H 3/10
·  Amplitude; Power
 G01H 3/12
·  ·  by electric means (G01H 3/14 takes precedence)  [2]
 G01H 3/14
·  ·  Measuring mean amplitude; Measuring mean power; Measuring time integral of power  [2]
 G01H 5/00
Measuring propagation velocity of ultrasonic, sonic or infrasonic waves
 G01H 7/00
Measuring reverberation time (measuring absorption of vibrations in a material G01N; modifying acoustic properties to change reverberation time G10K)
 G01H 9/00
Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
 G01H 11/00
Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
 G01H 11/02
·  by magnetic means, e.g. reluctance  [4]
 G01H 11/04
·  ·  using magnetostrictive devices  [4]
 G01H 11/06
·  by electric means  [4]
 G01H 11/08
·  ·  using piezo-electric devices  [4]
 G01H 13/00
Measuring resonant frequency
 G01H 15/00
Measuring mechanical or acoustic impedance  [3]
 G01H 17/00
Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups  [4]