Abstract
‘‘Why does a grand piano sound so much better than an upright piano?’’ This question is frequently discussed. Is it the sound itself, or the inharmonicity, or is it the way of playing the different instruments, or the sound pattern? All these questions have been investigated in the former laboratory of musical acoustics of the PTB by Taro Mori with very interesting results. Results of measurements and subjective hearing tests will be presented, and the method itself will be explained. One of the most interesting findings is that it is nearly impossible to distinguish between an upright and a grand piano in hearing tests by listening only to single tones, sequences of tones or chords. Better results are found by performing complete musical pieces on the instruments under test.
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