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MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES (generation of mechanical vibrations without measurement B06B, G10K; measuring position, direction or velocity of an object G01C, G01S; measuring quasi-steady pressure of a fluid G01L 7/00; determining unbalance G01M 1/14; determining properties of material by sonic or ultrasonic waves transmitted therethrough G01N; systems using the reflection or reradiation of acoustic waves, e.g. acoustic imaging, 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; piezo-electric, electrostrictive or magnetostrictive elements in general H01L; manufacture of electromechanical resonators by processes which include measurement of frequency with consequential modification of the resonator H03H 3/00, {H03H 3/007, H03H 9/00})
Definition statement
This subclass covers:

Apparatus or methods for the measurement, or measurement in combination with generation, of mechanical vibrations or the like, and particularly for the measurement of:

  • mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means;
  • mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties;
  • mechanical vibrations or ultrasonic, sonic or infrasonic waves by other means;
  • vibrations in solids by using direct conduction to the detector;
  • vibrations in fluids by using a detector in a fluid;
  • propagation velocity of ultrasonic, sonic or infrasonic waves;
  • reverberation time;
  • resonant frequency;
  • mechanical or acoustic impedance.
References relevant to classification in this subclass
This subclass does not cover:

Measuring force or stress

Detecting knocks in internal-combustion engines

Testing dynamic balance of machines or structure, determining unbalance

Determining unbalance by oscillating the body to be tested and converting vibrations due to unbalance into electric variables

Vibration testing of structures

Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object

Measuring acceleration, deceleration, shock

Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems

Sonar systems designed for mapping or imaging

Seismology; Seismic or acoustic prospecting or detecting

Manufacture of electromechanical resonators by processes which include measurement of frequency with consequential modification of the resonator

Informative references
Attention is drawn to the following places, which may be of interest for search:

Generating or transmitting mechanical vibrations in solids without measurement

Measuring distance, levels or bearings; Navigation; Gyroscopic instruments; Photogrammetry or videogrammetry

Measuring pressure of a fluid or fluent solid material

Acousto-optical devices

Obtaining records by techniques analogous to photography using ultrasonic, sonic or infrasonic waves

Musical instruments

Generating or transmitting mechanical vibrations in fluids without measurement

Arrangements for producing a reverberation or echo sound in fluids

Speech analysis or synthesis; Speech recognition

Information storage based on relative movement between record carrier and transducer

Piezo-electric, electro-strictive or magneto-strictive elements

Measuring {characteristics of} vibrations in solids by using direct conduction to the detector (G01H 9/00, G01H 11/00 take precedence)
Definition statement
This group covers:

Measuring characteristics of vibrations of rotating machines, using direct contact of the transducer, microphones, or optical detectors.

Measuring characteristics of vibrations of the rotor of turbo machines, using direct contact of the transducer, microphones, or optical detectors.

References relevant to classification in this group
This group does not cover:

Transmitting measuring signals from a borehole to the surface by transmitting torsional acoustic waves through the drillstring or casing

Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties,

Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means

Special rules of classification within this group

Except for G01H 1/10 (torsional vibrations), groups G01H 1/04 - G01H 1/16 are not currently used for the classification of new documents. Since no distinction with regard to transverse, torsional or longitudinal vibrations has been made while classifying documents, the subject matter which is presumably covered by these groups is effectively classified in G01H 1/00.

Measuring {characteristics of} vibrations by using a detector in a fluid (G01H 7/00, G01H 9/00, G01H 11/00 take precedence)
Definition statement
This group covers:
  • Measuring frequency.
  • Measuring amplitude or power.
  • Dosimeters.
References relevant to classification in this group
This group does not cover:

Measuring reverberation time

Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means

Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties,

Devices for measuring rapid changes, such as oscillations, in the pressure of steam, gas, or liquid

{Testing or calibrating of detectors covered by the subgroups of G01H 3/00(calibrating geophysical instruments, e.g. seismic receivers G01V 13/00)}
Relationship between large subject matter areas

G01V 13/00 covers the calibration of devices covered by the groups G01V 1/00, G01V 3/00, G01V 7/00, G01V 9/00 and G01V 11/00, i.e. prospecting or detecting using acoustic, seismic, electric, magnetic, gravitational, or optical means.

Measuring propagation velocity of ultrasonic, sonic or infrasonic waves, {e.g. of pressure waves}
References relevant to classification in this group
This group does not cover:

Measuring temperature using measurement of the velocity of propagation of sound

Analysing fluids by measuring propagation velocity or propagation time of acoustic waves

Measuring speed of fluids, e.g. of an air-stream

Measuring reverberation time; {Room acoustic measurements}(measuring absorption of vibrations in a material G01N; modifying acoustic properties to change reverberation time G10K)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Measuring absorption of vibrations in a material

Arrangements for producing a reverberation or echo sound in fluids

Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
Definition statement
This group covers:

Measuring vibrations or sonic waves using electromagnetic waves, e.g. light.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Attention is drawn to the following places, which may be of interest for search

Measuring force or stress by measuring variations in optical properties of a material when it is stressed

Measuring pressure of a fluid by acoustic means

Analysing materials using optoacoustic interaction with the material

Measuring acceleration, measuring shock by photoelectric pick-up

Electro-optic transducers

Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties, {e.g. capacitance or reluctance(structural combination of musical instruments with microphones or other pick-up devices G10H 3/16, G10H 3/18, G10H 3/20)}
Definition statement
This group covers:

Measuring by magnetic or electromagnetic means;

Measuring by electric means

Informative references
Attention is drawn to the following places, which may be of interest for search:

Measuring acceleration, deceleration shock with conversion into electric or magnetic variables

Burglar alarms actuated by variation in capacitance or inductance or a circuit

Structural combination of musical instruments with microphones or other pick-up devices

Measuring resonant frequency
References relevant to classification in this group
This group does not cover:

Analysing fluids by measuring frequency or resonance of acoustic waves

Analysing solids by measuring frequency or resonance of acoustic waves

Measuring mechanical or acoustic impedance
Informative references
Attention is drawn to the following places, which may be of interest for search:

Analysing fluids by measuring acoustic impedance

Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups {(see provisionally also G01H 1/00)}
Definition statement
This group covers:

Prediction of vibration patterns.

Chladni techniques.

References relevant to classification in this subclass/group
This group does not cover:

Measuring characteristics of vibrations in solids by using direct conduction to the detector

Measuring characteristics of vibrations by using a detector in a fluid

Measuring propagation velocity of ultrasonic, sonic or infrasonic waves

Measuring reverberation time

Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means

Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties,

Measuring resonant frequency

Measuring mechanical or acoustic impedance

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Last Modified: 10/11/2013