G
SECTION G — PHYSICS
  
INSTRUMENTS
 G10
MUSICAL INSTRUMENTS; ACOUSTICS
 G10

Note(s)

This class covers generally all sound-emitting devices, whether or not they may be considered as being musical.

  1. The term "musical instrument", used in this class, should not be understood as excluding devices emitting a single sound signal.
  2. For the convenience of users, the following Class Index is given in place of Sub-class Indexes, to show the grouping of the elaborations belonging to different sub-classes, under the three fundamental types: Wind instruments
    String instruments
    Percussion instruments
    which relate clearly to the majority of instruments.
  3. There are of course some instruments of which the principle of operation belongs less clearly to one of these three types. They correspond to groups G10D 17/00 and G10K 7/00, G10K 9/00, G10K 10/00, all the other groups normally finding a definite place.

 G10L
ANALYSIS OR SYNTHESIS OF SOUND WAVES; RECORDING WAVE-FORMS OF SOUND WAVES, e.g. SPEECH (measurement of mechanical vibrations G01H, e.g. G01H 3/08; electrophonic musical instruments G10H)
 G10L 1/00
Analysis or synthesis of sound waves, e.g. vocoder
 G10L 1/02
·  Derivation or interpretation of characteristics of sound waves
 G10L 1/04
·  ·  Detecting absence or presence of specific characteristics
 G10L 1/06
·  Removing redundancy of information contained in sound waves, e.g. to decrease frequency band required for transmission (G10L 1/10 takes precedence; modifications of systems to decrease bandwidth of signals in general H04B 1/66)
 G10L 1/08
·  Conversion of speech into digital information or vice versa
 G10L 1/10
·  Synthesis of sound waves using generators responding to characteristic wave-forms of sound, e.g. noise generator responding to whispering
 G10L 1/12
·  Recording or displaying of wave-forms of speech
 G10L 1/14
·  ·  by displaying on screen of cathode-ray tube
 G10L 1/16
·  Methods or arrangements for printing-out speech