G
SECTION G — PHYSICS
  
INSTRUMENTS
 G01
MEASURING (counting G06M); TESTING
 G01H
MEASUREMENT OF MECHANICAL VIBRATIONS, e.g. OF SOUND WAVES (generation of mechanical vibrations without measurement B06B, G10, H04R; measuring position, direction or velocity of an object G01C, G01S; transducers per se, see in the relevant sub-classes, e.g. G01L, H01L, H04R; determining unbalance G01M 1/14; determining properties of materials by sonic or ultrasonic waves transmitted therethrough G01N; making geophysical measurements G01V; recording vibrations for subsequent reproduction G10L, G11B; manufacture of electromechanical resonators by processes which include measurement of frequency with consequential modification of the resonator H03H 3/00)
 G01H

Note(s)

  1. Attention is drawn to the notes immediately following the class title (G01).
  2. This sub-class includes the combination of generation and measurement of mechanical vibrations.
 G01H 1/00
Measuring characteristics of 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 3/00
Measuring characteristics of 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 vibrations, e.g. of pressure 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 characteristics of vibrations by using radiation-sensitive means
 G01H 11/00
Measuring characteristics of vibrations by detecting changes in capacitance or reluctance
 G01H 13/00
Measuring resonant frequency