Performance assist apparatus of wind instrument
| Autor: | Fujii Junji |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Variable-gain amplifier
integumentary system Acoustics and Ultrasonics Computer science Microphone Astrophysics::High Energy Astrophysical Phenomena Controller (computing) Acoustics Astrophysics::Instrumentation and Methods for Astrophysics Pressure sensor Signal Vibration Arts and Humanities (miscellaneous) Control theory Physics::Space Physics Envelope (radar) Actuator Physics::Atmospheric and Oceanic Physics Excitation |
| Zdroj: | The Journal of the Acoustical Society of America. 127:1178 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/1.3326927 |
| Popis: | In an apparatus for assisting play of a wind instrument, an actuator is attached to the wind instrument for vibrating a portion of the wind instrument so as to assist play of the wind instrument. A microphone receives a vibration of a sound generated by the wind instrument and generates a vibration signal representing the vibration of the sound. A breath pressure sensor detects a pressure of a breath that is blown into the wind instrument during the play thereof, and generates a breath pressure signal corresponding to the detected pressure of the breath. A controller generates a control signal corresponding to the product of an inverse value of an envelope of the vibration signal and a value of the breath pressure signal. A variable gain amplifier amplifies the vibration signal with a variable gain which varies in response to the control signal so that an output signal of the variable gain amplifier is provided to enable the excitation part to vibrate the portion of the wind instrument. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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