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realism assessment of sonic boom simulatorsDevelopments in small supersonic aircraft design are predicted to result in low-intensity sonic booms. Booms generated by current aircraft are similar to those that led to the ban on commercial supersonic fli ght over the US, so are unsuitable for parametric studies of psychoac oustic response to low-intensity booms. Therefore, simulators have be en used to study the impact of predicted low-intensity sonic booms. H owever, simulators have been criticized because, when simulating conv entional-level booms, the sounds were observed to be unrealistic by p eople experienced in listening to sonic booms. Thus, two studies were conducted to measure the perceived realism of three sonic boom simul ators. Experienced listeners rated the realism of conventional sonic boom signatures when played in these simulators. The effects on percei ved realism of factors such as duration of post-boom noise, exclusion of very low frequency components, inclusion of ground reflections, a nd type of simulator were examined. Duration of post-boom noise was f ound to have a strong effect on perceived realism, while type of simu lator had a weak effect. It was determined that post-boom noise had t o be at least 1.5 seconds long for the sound to be rated very realist ic. Loudness level did not affect realism for the range of sounds pla yed in the tests (80-93 dB ASEL).
Document ID
20080022677
Document Type
Preprint (Draft being sent to journal)
Authors
Sullivan, Brenda M.
(NASA Langley Research Center Hampton, VA, United States)
Davies, Patrica
(Purdue Univ. West Lafayette, IN, United States)
Hodgdon, Kthleen K.
(Pennsylvania State Univ. State College, PA, United States)
Salamone, Joseph A., III
(Gulfstream Aerospace Corp. Aavannah, GA, United States)
Pilon, Anthony
(Lockheed Martin Aeronautics Co. Palmdale, CA, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2008
Subject Category
Acoustics
Distribution Limits
Public
Copyright
Other