AN EXPERIMENTAL STUDY OF THE ACCURACY FOR REPEATING THE MUSICAL TONE
Sakae Sakurai, Ken Okamoto · Nippon Jibiinkoka Gakkai Kaiho · 1966
The authors have studied how accurately 30 young women can repeat a tone or can sing the musical tone from c' to c". They repeated a tone of c' more correctly when it was produced by piano than a tone produced by a tuning fork. After the examinees heard a tone of c' from a piano or a tuning fork, 70% of them could sing the musical scale of tone above the tone of c' with error of ±2% of each tone. It is known that to sing the musical scale after the first tone of c' is given is more difficult than to repeat the tone. When the examinees tried to repeat a halfpitched tone such as f' above e' or c" above b', they tended to repeat f' or c" lower than each accurate frequency.