Ecotech HiVol 3000

HiVol 3000 User manual 1.7 Appendix
71
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MANUFACTURER’S NOISE TEST
MODEL: HiVol 3000 HIGH-VOLUME AIR SAMPLER
HiVol 3000, muffler (production), TSP inlet
This report shows the effect of installing a muffler as noise reducing method to the
HiVol 3000. The tests have not been performed in an anechoic chamber
. They were
performed in an area surrounded by concrete walls at a distance of about 5m from
each side. The floor surface was concrete.
Hivol sound level checks at 3m (20/07/02)
Using Delta Ohm Integrating Sound Level Meter Model HD9020
Meets IEC 821 & 651 Type 1
All measurements in dB(A), Front / Rear / Outlet side
All measurements averaged at 3m per EPA requirements
Background 48dB(A)
Effect of muffler on test unit:
Without muffler: 55dB(A) front and rear, 67dB(A) exhaust side
With muffler: 54dB(A) front and rear, 60dB(A) exhaust side