US 6,392,136 B1 · Musical tone generation structure of electronic musical instrument

Abstract

An electronic musical instrument such as an electronic piano has a musical tone generation structure that closely simulates and reproduces musical tones with nuances of musical expressions with fidelity to acoustic musical instruments such as acoustic pianos. In the casing of the electronic piano, speakers are attached to a speaker attachment plate, which is placed substantially horizontal, such that front sides of the speakers are directed upwards. The sounds radiated from the front sides of the speakers are reflected by a reflector board which is hinged to close or open at a prescribed angle of inclination with respect to a top board, so that reflected sounds are transmitted towards the audience. Enclosures are provided inside of the casing below the speaker attachment plate and contain mufflers having a relatively small thickness therein. Through holes whose openings are directed downwards are formed to penetrate through a bottom plate of the enclosures, wherein the total area of openings of the through holes is larger than the total area of the speakers. Sounds radiated from the backsides of the speakers propagate through the enclosures and are transmitted towards the floor via the through holes, so that reflected sounds are transmitted towards the audience through the air. Further, the electronic piano as a whole vibrates in response to vibrations caused by the speakers. Thus, the electronic piano produces mixed sounds that reproduce acoustic musical tones having the nuances of musical expression of an acoustic piano.

Claims14

Dependent claims

A musical tone generation structure of an electronic musical instrument comprising:

a speaker attachment plate that is arranged substantially horizontal within a casing of the electronic musical instrument in its normal use state;
a plurality of speakers attached to the speaker attachment plate such that front sides thereof are directed upwards;
and
an enclosure portion that are formed in connection with backsides of the speakers attached to the speaker attachment plate within the casing of the electronic musical instrument, wherein the enclosure portion has a sound release hole whose opening is directed downwards from a bottom thereof,
wherein a total area of the opening of the sound release hole is larger than a total area of the speakers.

2 more elements

A musical tone generation structure of an electronic musical instrument comprising:

at least two speakers;
and
an enclosure portion that is defined by an upper plate, a side board and a bottom plate within a casing of the electronic musical instrument, wherein the upper plate to which the speakers are att ached such that their front sides are directed upwards is arranged substantially horizontal in a normal use state of the electronic musical instrument, the side board is arranged to define an exterior contour of the casing and is connected with the upper plate and the bottom plate respectively, and the bottom plate is arranged in connection with backsides of the speakers attached to the upper plate, wherein a plurality of sound release holes whose openings are directed downwards are formed to penetrate through the bottom plate of the enclosure portion such that a total area of the openings of the sound release holes is larger than a total area of the speakers, and wherein a separation plate is provided to divide an entire space of the enclosure portion into plural sections in connection with the sound release holes respectively.

Dependencies are inferred from the claim text.

Musical tone generation structure of electronic musical instrument

Life of this patent

Musical tone generation structure of electronic musical instrument

Life of this patent

Abstract

Claims14