What’s the Ear For? How to Protect It 1643Figure 47-10. This is a dBA (A weighted SPL) for all 4 days
of NAMM- The booth power was shut down in the evening
and then turned on for the exhibition. The SLARM™
restarted itself each morning and logged automatically
during this time. It was not connected to a computer. The
black indications are of sound levels exceeding the thresh-
olds set in the SLARM™. Courtesy ACO Pacific.
Figure 47-11. All four days 15 s LeqA. Courtesy ACO
Pacific.
110
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90
80
70
60
50
40
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20
10Leq(dt) – 80.58 dB : Duration – 1:00:00
SLARMAnalysis™ Calclation of a 1 hour Leq110
100
90
80
70
60
50
40
30
20
10Figure 47-12. Day 2—a typical day. This chart is the Leq
(15 s) dBA. This basically represents the running average
sound level. Courtesy ACO Pacific.110
100
90
80
70
60
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20
10