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US 6,888,058 B2Granted
Electronic musical instrument
AssigneeYamaha Corporation
InventorsTomomitsu Urai, Shinichi Sawara, Fukushi Kawakami
Life of this patent
Estimating the term…
Abstract
Main speakers are arranged on the enclosure front surface of an electronic piano. Auxiliary speakers (18L, 18R) are arranged on the rear surface of the enclosure. Microphones are arranged in close proximity of the main speakers. A performance sound is regenerated from the main speakers. The regenerated sound from the main speakers is picked up by microphones (20L, 20R). FIR filters are used to generate the reflected signal of a picked-up sound signal from the microphones. The generated reflected sound signal is regenerated from auxiliary speakers.
Claims19
An electronic musical instrument comprising:
- a main speaker which regenerates a performance sound by a performer;
- a microphone which picks up a sound regenerated by the main speaker,
- a reflected sound generator which generates a reflected sound signal from the sound picked up by the microphone;
- and
- an auxiliary speaker for regenerating the reflected sound from the reflected sound signal,
- wherein the microphone is arranged in a position relatively close to the main speaker and distant from the auxiliary speaker,
- wherein the main speaker, the auxiliary speaker, and the microphone are arranged so that the sound regenerated by the auxiliary speaker is acoustically fed back to the microphone, and
- wherein only the auxiliary speaker regenerates the reflected sound picked up by the microphone.
5 more elements
An electronic musical instrument comprising:
- a main speaker which regenerates a performance sound by a performer;
- a microphone which picks up a sound regenerated by the main speaker;
- a reflected sound generator which generates a reflected sound signal from the sound picked up by the microphone;
- and
- an auxiliary speaker for regenerating the reflected sound from the reflected sound signal,
- wherein the microphone is arranged in a position relatively close to the main speaker and distant from the auxiliary speaker,
- wherein the main speaker, the auxiliary speaker, and the microphone are arranged so that the sound regenerated by the auxiliary speaker is acoustically fed back to the microphone, and
- wherein the main speaker is a multi-way speaker and the microphone is arranged in a position between a plurality of speaker units constituting the multi-way speaker.
5 more elements
An electronic musical instrument comprising:
- a main speaker which regenerates a performance sound by a performer;
- a microphone which picks up a sound regenerated by the main speaker;
- a reflected sound generator which generates a reflected sound signal from the sound picked up by the microphone;
- and
- an auxiliary speaker for regenerating the reflected sound from the reflected sound signal,
- wherein the microphone is arranged in a position relatively close to the main speaker and distant from the auxiliary speaker,
- wherein the main speaker, the auxiliary speaker, and the microphone are arranged so that the sound regenerated by the auxiliary speaker is acoustically fed back to the microphone, and
- wherein initial delay time of the reflected sound signal generated by the reflected sound generator is 5 to 30 msec.
5 more elements
An electronic musical instrument comprising:
- a main speaker which regenerates a performance sound by a performer;
- a microphone which picks up a sound regenerated by the main speaker;
- a reflected sound generator which generates a reflected sound signal from the sound picked up by the microphone;
- and
- an auxiliary speaker for regenerating the reflected sound from the reflected sound signal,
- wherein the microphone is arranged in a position relatively close to the main speaker and distant from the auxiliary speaker,
- wherein the main speaker, the auxiliary speaker, and the microphone are arranged so that the sound regenerated by the auxiliary speaker is acoustically fed back to the microphone, and
- wherein initial delay time of the reflected sound signal generated by the reflected sound generator is 30 to 60 msec.
5 more elements
An electronic musical instrument comprising:
- a main speaker which regenerates a performance sound by a performer;
- a microphone which picks up a sound regenerated by the main speaker;
- a reflected sound generator which generates a reflected sound signal from the sound picked up by the microphone;
- and
- an auxiliary speaker for regenerating the reflected sound from the reflected sound signal,
- wherein the microphone is arranged in a position relatively close to the main speaker and distant from the auxiliary speaker,
- wherein the main speaker, the auxiliary speaker, and the microphone are arranged so that the sound regenerated by the auxiliary speaker is acoustically fed back to the microphone, and
- wherein an acoustic feedback system constituted by the microphone and the auxiliary speaker has a loop gain of −6 dB or below.
5 more elements
An electronic musical instrument comprising:
- a main speaker which regenerates a performance sound by a performer;
- a microphone which picks up a sound regenerated by the main speaker;
- a reflected sound generator which generates a reflected sound signal from the sound picked up by the microphone;
- and
- an auxiliary speaker for regenerating the reflected sound from the reflected sound signal;
- an automatic adjustment unit which automatically adjusts frequency response and sound volume of a circuit of a regeneration system of the auxiliary speaker so as to obtain the loop gain having a predetermined value of −6 dB or below by regenerating a test sound from the auxiliary speaker,
- wherein the microphone is arranged in a position relatively close to the main speaker and distant from the auxiliary speaker, and
- wherein the main speaker, the auxiliary speaker, and the microphone are arranged so that the sound regenerated by the auxiliary speaker is acoustically fed back to the microphone.
5 more elements
An electronic musical instrument comprising:
- a main speaker which regenerates a performance sound by a performer;
- a microphone which picks up a sound regenerated by the main speaker;
- a reflected sound generator which generates a reflected sound signal from the sound picked up by the microphone;
- and
- an auxiliary speaker for regenerating the reflected sound from the reflected sound signal,
- wherein the microphone is arranged in a position relatively close to the main speaker and distant from the auxiliary speaker,
- wherein the main speaker, the auxiliary speaker, and the microphone are arranged so that the sound regenerated by the auxiliary speaker is acoustically fed back to the microphone, and
- wherein the reflected sound generator selectively generates a reflected sound signal whose initial delay time is 5 to 30 msec and whose duration is 300 to 600 msec or a reflected sound signal whose initial delay time is 30 to 60 msec and whose duration is 600 to 3000 msec, depending on the selection by a performer.
5 more elements
An electronic musical instrument comprising:
- a main speaker which regenerates a performance sound by a performer;
- a microphone which picks up a sound regenerated by the main speaker;
- a reflected sound generator which generates a reflected sound signal from the sound picked up by the microphone;
- and
- an auxiliary speaker for regenerating the reflected sound from the reflected sound signal,
- wherein the microphone is arranged in a position relatively close to the main speaker and distant from the auxiliary speaker,
- wherein the main speaker, the auxiliary speaker, and the microphone are arranged so that the sound regenerated by the auxiliary speaker is acoustically fed back to the microphone, and
- wherein the main speaker is arranged in the direction facing the performer and the auxiliary speaker is arranged in the direction not facing the performer.
5 more elements
Dependencies are inferred from the claim text.