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MSA4 – Best Chamber Type Spark
Arresting– Expected Attenuation is 28 to
32dBA Use a model MSA4 for the highest
degree of “critical”
grade silencing for areas requiring “hospital quiet”
noise reductions and spark arresting feature.
The MSA4 is presently the top-of-the-line
silencer
without resorting to multiple silencers in series or
custom designed silencers. MSA3 – Excellent
Chamber Type Spark
Arresting– Expected Attenuation is 24 to 28
dBA Use a model MSA3 for quiet
residential areas where
background noise is relatively low and “critical” grade
silencing with spark arresting feature is required.
Example: For truly quiet residential areas
where ambient
noise levels are very low and the sounds of birds
singing and the soft hum of air conditioning units may
be the noticeable noise features.
MSA2 – Better
Chamber Type Spark
Arresting– Expected Attenuation is 21 to 24
dBA Use a model MSA2 in residential
areas where
background noise is present but not objectionable and
spark arresting feature is desired. In these areas,
installation of an MSA2 on an engine exhaust is
intended to bring the noise level down to match the
ambient noise levels. Example: In a
quieter residential areas off the main
traffic areas and away from constant noise sources.
MSA1 – Good Chamber Type Spark
Arresting– Expected Attenuation is 17 to 20 dBA
Use a model MSA1 in residential and light
industrial
areas for spark arresting capability where background
noise is relatively high and constant and the need for
higher degrees of silencing is minimal.
Example: In residential neighborhoods having
high
traffic or light industry with relatively constant
background noise. Residents in these areas are
typically accustomed to the noise or make some efforts
to shield themselves from the ever present background
noise . Use of an MSA1 can keep engine exhaust noise
within existing noise levels. |
