CRT を用いるピアノ調律法の改良
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概要
- 論文の詳細を見る
This tuning method which do not require tuner's hearing sensation is well improved to bring high efficiency for the tuning works in a piano factory, but still there is a dissatisfaction as follows;This method takes 0. 2sec to one accurate observation at shortest, but many treble tones have their duration shorter than 0. 2sec. Thus , tuning evaluation is difficult and inaccuracy. Therefore;the following improved procedure is examined. Since the frequency deviation detector shows the same count number to any tones which have same pitch deviation, when no deviation the number set to be equal to a frequency in the middle range tone. And this detector is connected to the digital synthesizer for D/A conversion. Since this synthesizer generates a signal which is the same frequency as the count number, observe this signal as a substitute for the real signal. Thus, it is possible to tune any tones, by converting them to a middle tone. According to the above procedure, a trial tuning device for practical use is set up and sufficient results are obtained.
- 社団法人日本音響学会の論文
- 1985-03-01