This class covers generally all sound-emitting devices, whether or not they may be considered as being musical.
The term "musical instrument", used in this class, should not be understood as excluding devices emitting a single sound signal.
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.
This sub-class deals with musical instruments in which individual notes are constituted as electric oscillations under the control of a performer and the oscillations are converted to sound-vibrations by a loud-speaker or equivalent instrument.
using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument [3]
tones generated by frequency multiplication or division of a basic tone
G10H 5/07
· · ·
resulting in complex waveforms [3]
G10H 5/08
· ·
tones generated by heterodyning
G10H 5/10
·
using generation of non-sinusoidal basic tones, e.g. sawtooth
G10H 5/12
· ·
using semiconductor devices as active elements
G10H 5/14
·
using electromechanical resonator, e.g. quartz crystal, as frequency-determining element [3]
G10H 5/16
·
using cathode ray tube [3]
G10H 7/00
Instruments in which the tones are synthesised from a data store, e.g. computer organs (analysis or synthesis of sound waves per seFulltext... Hierarchy... Expanded...G10L) [3]