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Aero-Acoustic Noise and Control Lab – Seoryong Park – tjfyd11@snu.ac.kr School of Mechanical and Aerospace Eng., Seoul National University 301-1214, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea Popular version of paper 4aEA1, “Integrated simulation model for prediction of acoustic environment of launch vehicle” Presented Thursday morning, December 1, 2016 172nd ASA Meeting, Honolulu Literally […]

During our daily lives, there are rarely significant pressure fluctuations in the air above common noises, but in special cases it happens.

Loudspeakers are synonymous with audio reproduction and are widely used to play sounds people want to hear. Loudspeakers have also been used for the opposite purpose, to attenuate noise that people may not want to hear.

Horseshoe bats, for example, are found throughout Africa, Europe and Asia, and so-named for the shape of their noses, can change the shape of their outer ears to help extract additional information about the environment from incoming ultrasonic echoes.

NVH is a primary concern in car and home appliance industries because many consumers take into account the quality of noise when making buying decisions.