|  | 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. 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. 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 Fulltext... Hierarchy... Expanded...G10D 17/00 and Fulltext... Hierarchy... Expanded...G10K 7/00, Fulltext... Hierarchy... Expanded...G10K 9/00, Fulltext... Hierarchy... Expanded...G10K 10/00, all the other groups normally finding a definite place.

|  | G10B |
ORGANS; HARMONIUMS (mouth organs or accordions Fulltext... Hierarchy... Expanded...G10D; aspects of automatic actuation Fulltext... Hierarchy... Expanded...G10F; electronic organs Fulltext... Hierarchy... Expanded...G10H)

|  | G10C |
PIANOS (non-musical aspects of toy pianos A 63 H 5/02; aspects of automatic actuation Fulltext... Hierarchy... Expanded...G10F)

|  | G10D |
MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR (aspects of automatic actuation Fulltext... Hierarchy... Expanded...G10F; sound-producing devices not regarded as musical instruments or parts thereof Fulltext... Hierarchy... Expanded...G10K)

|  | G10F |
AUTOMATIC MUSICAL INSTRUMENTS (non-musical aspects of toy instruments Fulltext... Hierarchy... Expanded...A63H 5/00; sound-recording and reproducing Fulltext... Hierarchy... Expanded...G11B; associated working with recording or reproducing apparatus Fulltext... Hierarchy... Expanded...G11B 31/02)

|  | G10F |
Note(s) Aspects of musical instruments which are independent of the automatic actuation are covered by the relevant sub-classes Fulltext... Hierarchy... Expanded...G10B, Fulltext... Hierarchy... Expanded...G10C, Fulltext... Hierarchy... Expanded...G10D.

|  | G10G |
AIDS FOR MUSIC (metronomes Fulltext... Hierarchy... Expanded...G04B 21/00; teaching music Fulltext... Hierarchy... Expanded...G09B 15/00)

|  | G10H |
ELECTROPHONIC MUSICAL INSTRUMENTS (structural combinations of microphones, pick-ups, or amplifiers with musical instruments Fulltext... Hierarchy... Expanded...G10B, Fulltext... Hierarchy... Expanded...G10C, Fulltext... Hierarchy... Expanded...G10D; instruments in which each note is generated by a different individually-actuated mechanical resonating structure and is amplified electrically Fulltext... Hierarchy... Expanded...G10C; instruments in which each note is produced by a different electrically-vibrated sounding element Fulltext... Hierarchy... Expanded...G10D; electronic circuits in general Fulltext... Hierarchy... Expanded...H03)

|  | G10H |
Note(s) 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.

|  | G10K |
SOUND-PRODUCING DEVICES (sound-producing toys Fulltext... Hierarchy... Expanded...A63H 5/00; musical instruments or parts thereof, see the relevant sub-classes, e.g. Fulltext... Hierarchy... Expanded...G10D); ACOUSTICS NOT OTHERWISE PROVIDED FOR (generating or transmitting mechanical vibrations of infrasonic, sonic or ultrasonic frequency for performing mechanical work in general Fulltext... Hierarchy... Expanded...B06B; direction-finding, locating, distance or velocity measuring by means of infrasonic, sonic or ultrasonic waves Fulltext... Hierarchy... Expanded...G01S; signalling or calling arrangements, alarm arrangements Fulltext... Hierarchy... Expanded...G08B)

|  | G10L |
ANALYSIS OR SYNTHESIS OF SOUND WAVES; RECORDING WAVE-FORMS OF SOUND WAVES, e.g. SPEECH (measurement of mechanical vibrations Fulltext... Hierarchy... Expanded...G01H, e.g. Fulltext... Hierarchy... Expanded...G01H 3/08; electrophonic musical instruments Fulltext... Hierarchy... Expanded...G10H)