For a summary of chapter three, and an introduction to chapter four, the following pages briefly illustrate how the sound of note C2v81 is analysed,
| Venue | Array | Pianos |
| MW | 6 mics 3metres mics 1-6 1 mic 10 cm above mic7 1 mic 6metres mic8 |
STU & STE |
Music Workshop (MW) Array :
| MW Array | |
 |
Mics 2,3,4,5.6 are DPA 406 omni microphones, 3m measured from the same point on the piano frame. Mic 8 DPA O Type 4011-TL cardiod, was positioned at 6metres to record projection levels. Mic7 is a Bruel & Kjaer type 2239 sound level microphone, recording the leq level of the sound power of the source. Mic 1,6 are DPA 406 omni microphones, 3m measured from the ends of the soundboards. |
| MW Array microphone description Fig3.11 | |
The table and graph below illustrate the amplitudes of lp and leqA of pianos STE and STU, captured in the 8 microphone array in the Music Workshop (MW), of note C2 65.406 Hz, struck at velocity 81 (v81).
Sound Pressure Levels for the note C2v81:
Sound Pressure Summary C2v81:
| MWMicrophone Array C2 v81 | 13m180° (behind pianist) |
23m 45° | 33m 90° | 43m 120° | 53m 150° | 63m 180° (behind bass bridge ) |
7 SLM10cm over hammer | 8 6m90° cardioid |
| STE 58s | ||||||||
| Lp | 88(.3) 86 | 88(.2) | 83.8 84 | 84(.3) | 85 | 86.9 87 | 95.9 96 | 71.6 72 |
| LeqA | 64.965 62 | 64.665 | 61.9 62 | 62 | 63 | 64(.3) 63 | 69.5 70 | 50.5 51 |
| STU | ||||||||
| Lp | 87(.2) 86 | 88(.4) | 86(.3) | 85.9 86 | 88 | 91.992 94 | 92.0 | 79(.4) |
| LeqA | 61.9 62 | 64 | 62.8 63 | 63.6 64 | 63 | 65(.4 )66 | 65.7 66 | 56.7 57 |
| Sound Pressure Level C2v81 8 microphones. Table 3.7 | ||||||||
