2. C3v20 mic3.

Both Stuart and Steinway sound radiated C3v20 at 74dB to mic3. The larger dynamic range of the Stuart is evident at the onset, with a percussive impact of sound, and a faster rise to its full sound. The Stuart Fnd , 2^nd , 4^th & 6^th prt. are larger at the onset, as viewed in the spectrogram below. The Steinway spectrum evolves more gradually at the onset, whereas the wider and brighter Stuart spectra is clearly more immediately at the onset.

The rapid decay in the Steinway’s 2^nd partial at 2s, influences a sudden softening of the composite SPL. The Stuart sound decayed at marginally slower rate than Steinway, after 4s.

The faster onset decay of the composite Stuart sound (i), transfers to the after-sound settled oscillation (ii) 2s earlier than the Steinway (ii) . The onset and after-sound amplitudes of each 2^nd partial directly influences the loss of energy observed in the decay curve.