The MW array:

Overall Sound Pressure Level of Each Piano

The SPLs of all four notes, of both the Steinway and Stuart pianos in the MW space, across 8 microphones, and three velocity strikes, were found to be surprisingly similar when processed by the General Linear Model (GLM)²⁴⁰ .The boxgraphs below, show the (GLM) reading of the SPL (dB) of all 96 piano sounds recorded, per piano, in the MW. Marginal differences show the Steinway to be louder and softer in the extreme ranges of loudness, r1 and r4. The Stuartismarginally louder in the lower three ranges of loudness,r1-3. The smaller range of the Stuart reveals a higher consistency of volume was produced by the fixed and calibrated velocity key strikes.

Total SPL: MW lp & leqA v20, v54, v81 boxgraph :

²⁴⁰Generalized Linear ModelsFaá Di Bruno’s Formula to Graduation, Whittaker–Henderson J. A. Nelder, R. J. BakerPublished Online: 15 AUG 2006 DOI: 10.1002/0471667196.ess0866.pub2 John Wiley & Sons, Inc.