Simulation of sound production mechanism (Acoustical research on the piano, Part 2).
スポンサーリンク
概要
- 論文の詳細を見る
The mechanism of sound generation on the piano can be divided into four stages:-(a) transmission of energy from a hammer to a set of strings, (b) propagation of energy in the strings, (c) transition of energy from the strings to the soundboard through the bridge, and (d) acoustic radiation of the energy from the soundboard. This process is represented by an electrical circuit model, each string being represented by a transmis sionline, and the quantitative relationship of the model are calculated by a computer. When a hammer strikes a string, a nearly half-sinusoidal pulse is generated, and this propagates along the transmission line, and then is reflected by the impedances of the bridge and the fixed end of the string. The propagation and reflection change the waveform of the initial pulse and reduce its amplitude. The driving velocity of the soundboard is produced by applying the sum of the forces of all the strings to the driving pointimpedance. This driving velocity produces a sound pressure, and its waveform is determined by the transmission characteristics of the soundboard. An artificial piano sound can be produced from a calculated waveform through a D-A converter. When the fundamental frequency of each string in a set is slightly detuned, they produce beats in each partial making an inharmonic sound. The lower partials in the produced sound change relatively slowly, while the higher partials change relatively rapidly. The amplitude of the initial part of the sound ('initial sound') decays rapidly, while that of the sustained part ('aftersound') decays slowly. This explains how a delicate timbre of the piano sound is produced.
- 一般社団法人 日本音響学会の論文
一般社団法人 日本音響学会 | 論文
- How large is the individual difference in hearing sensitivity?: Establishment of ISO 28961 on the statistical distribution of hearing thresholds of otologically normal young persons
- Applying generation process model constraint to fundamental frequency contours generated by hidden-Markov-model-based speech synthesis
- Vocal cord vibration in the production of consonants. Observation by means of high-speed digital imaging using a fiberscope.:Observation by means of high-speed digital imaging using a fiberscope
- The early reflections of the impulse response in an auditorium.
- Multiple reflections between rigid plane panels.