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|Document Type: ||Thesis or dissertation|
|Title: ||Investigations into the Optimisation of Sound Suppressor Geometry|
|Authors: ||Lister, Aimee|
|Supervisors: ||Allsop, D. F.|
|Issue Date: ||2007|
|Abstract: ||Health and Safety regulations are becoming ever more stringent in order to
protect us in all aspects of our daily lives to prevent noise pollution and
damage to hearing. For those in the military and some areas of civilian life
working with firearms there is a definite need to reduce the sound levels from
them. In order to do this a working knowledge of sound moderators and
suppressors is considered vital in order to assess their capabilities and
optimise their performance.
The project looks at a theoretical model of an integral suppressor for a
modified 12 bore shotgun. The model was used to determine the area of
holes through the barrel, allowing gas into the suppressor, has the greatest
effect on the pressure within the suppressor. It was found that the volume of
the suppressor and position of the hole through the barrel did not have such a
significant effect on the pressure.
The theoretical work was supported by experimental trials which confirmed
the barrel hole size has a significant effect on the pressure. The experimental
work also showed for the low pressure system the hole size through the
baffles did not have a significant effect on the pressure.
Work was carried out to establish whether current practice for proofing
suppressors was sufficient. The results show that proof rounds give a lower
pressure in an external suppressor than standard ammunition. Tests on
improvised suppressors showed they are effective and allowed a visual
analysis on suppressors. Baffles were shown to be advantageous in a
|Appears in Collections:||PhD, EngD, MPhil and MSc by research theses - Cranfield Defence and Security, Shrivenham|
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