17 Vibration and Acoustic Analysis of Acoustic Guitar in Consideration of Transient Sound 179 Fig. 17.3 Acoustic FRF Fig. 17.4 Mode shapes of front plate Keynote 80 0 -20 Time s 0 6.0 0 1024 Frequency Hz SPL dB Fig. 17.5 Guitar A 6th string sound spectrogram 17.3 Sound Quality Change As an example of sound quality change, “high harmonic sound more sustains”, “low frequency sound starts up quickly” are commonly discussed. But the relation between those changes felt by player and listener and the sound modification is not clear. Therefore the original sound of guitar A 6th string picking is modified and evaluated as follows.
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