Jet Engine Noise
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How loud is a jet engine? - Noise Monitoring Services
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Reducing the noise emission from an aircraft engine at its source
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Noise Control/Supression
Patent US3187835 - Jet engine noise suppressor - Google Patents
Jet Engine Noise Research Takes Off
Simon Mendez: Research: jet noise
How loud is a jet engine? - Noise Monitoring Services
Noise Control/Supression