 Noise Control Analysis
Software
Sound
Level Predictions:
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 Sound
Measurement Equipment
Long
Term Sound Monitoring:
We have several weatherproof long term
"logging" monitors we use for analyzing sound levels that may
change over a period of 24 hours or more. These can be
useful for observing changes or time histories of the ambient
environment during the day or for
measuring and documenting the changes that occur when a noise
source is "turned on" as shown in the figure above. In many
cases, 24 hour or longer measurements can
provide significantly clearer representations of the situation than can
be obtained by a single "snapshot in time" with a handheld sound level
meter.
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Diagnostic
Measurements
Very
Narrow Band Frequency Resolution Measurements:
We have sound
instrumentation that can measure well above and below audible frequency
ranges and everything in between. Our FFT instrumentation allows
us to measure very narrow frequency bands for diagnostic purposes when
we need be "exact". That's particularly
useful to help find out what's wrong with the equipment or
machine.
We also use octave band and 1/3 octave band sound measurement
equipment to help with modeling simulations and measuring frequency
dependent noise ordinances.
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 We can communicate with you
Sound
Level Contours:
We present data in an easily visualized way to help you to understand
the situation without needing a background in the field of
acoustical engineering.
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Sound data to support
theory
Silencer
and Transmission Loss Performance Calculations:
When silencing
needs to be designed, we have methodology that's been honed from years
of field test data and high levels of theoretical development.
Our methodologies account for flow temperature, flow speed and
direction, geometry, materials and various other physical
properties.
We also have the tools to estimate the transmission loss properties of
composite metal wall structures and standard building materials.
We have designed over 350 silencers and mufflers for large gas turbine
applications where the silencers can reach over 30 feet in length and
have cross sections of 500 Sq. Ft.!!! Having the theory, data and
expertise to back up the calculations can save a significant amount of
cost and avoid "over design" of the silencer.
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Acoustical Standards
Testing
to the Standards:
Often our work requires A-weighted, community or OSHA sound
level
measurements that must be performed in accordance with ANSI,
ASTM, ISO or MIL-STD standards. We prepare test protocols that
meet the standards and won't be easily challenged by other noise
control
engineers after the test is completed.
We also perform field transmission loss tests and reverberation time
measurements...all to the standards.
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