Numerous chemicals with ototoxic properties may cause hearing loss
directly, potentiate noise-induced hearing loss, or produce
additive effects. Of interest to the US Air Force are studies
showing ototoxic effects of JP-8 jet fuel and its hydrocarbon
constituents. The Naval Health Research Center (NHRC) at
Wright-Patterson AFB, Ohio, in conjunction with the USAF, is
studying the ototoxic effects of JP-8 in rats. The study requires a
white noise source that is one octave band wide, centered at 8 kHz
frequency, delivered from outside of exposure chambers. Sound
pressure levels must be within +/- 2 dB at all exposure points
within each chamber and within +/- 2 dB over a 6-hour run.
Electrodynamic shakers were successfully used to produce the
required input noise in three exposure chambers by inducing
vibration in chamber plenums. Distribution of sound pressure levels
across chamber exposure points were well controlled within a +/-
1.5 dB prediction interval ( = 0.05) or better. Stability at a
central reference point was well controlled over 6-hour runs within
a +/- 1 dB prediction interval ( = 0.05) or better. The final
system solution gives the NHRC a unique capability to deliver noise
and whole-body JP-8 aerosol exposures simultaneously.
General
Imprint: |
Biblioscholar
|
Country of origin: |
United States |
Release date: |
October 2012 |
First published: |
October 2012 |
Authors: |
John E Stubbs
|
Dimensions: |
246 x 189 x 6mm (L x W x T) |
Format: |
Paperback - Trade
|
Pages: |
120 |
ISBN-13: |
978-1-249-60024-4 |
Categories: |
Books >
Social sciences >
Education >
General
Promotions
|
LSN: |
1-249-60024-3 |
Barcode: |
9781249600244 |
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