Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Doo Young Gwak"'
Publikováno v:
Journal of Mechanical Science and Technology. 34:1429-1443
The multi-rotor type unmanned aerial vehicle (UAV) controls the movement through the rotational speed of each rotor. Since the phase of each rotor is different and minute variations of the rotational speed are always accompanied during flight, freque
Publikováno v:
Applied Acoustics. 138:121-132
Since the early 20th century, many studies have been conducted about the noise characteristics of trains, particularly in regards to annoyance. However, none of the studies considered the frequency dependence of short-term annoyance of railway noise.
Publikováno v:
Journal of Mechanical Science and Technology. 32:3557-3562
As the transportation system has become more complex, populations near airports, railways, and roads are commonly exposed to combined transportation noises. Aircraft and road traffic noises are most common in urban areas, and as such should be analyz
Autor:
Soogab Lee, Doo Young Gwak
Publikováno v:
The Journal of the Acoustical Society of Korea. 36:89-99
Publikováno v:
Journal of Sound and Vibration. 489:115651
This study investigates psychoacoustic aspects of the noise of multi-rotor type unmanned aerial vehicles (UAV). Two psychoacoustic experiments were performed for a dual purpose: to examine the difference of annoyance induced by the noise from three t
Publikováno v:
Journal of Mechanical Science and Technology. 30:4503-4509
Wind turbine noise is considered to be easily detectable and highly annoying at relatively lower sound levels than other noise sources. Many previous studies attributed this characteristic to amplitude modulation. However, it is unclear whether ampli
Publikováno v:
The Journal of the Acoustical Society of America. 136(6)
The powertrain of electric vehicles generates an unfamiliar acoustical environment for customers. This paper seeks optimal interior sound for electric vehicles based on psychoacoustic knowledge and musical harmonic theory. The concept of inserting a
Publikováno v:
Journal of Renewable and Sustainable Energy. 5:052008
Wind turbine noise referred to as “swishing sound” causes annoyance due to the amplitude modulation of the noise aerodynamically generated from blades. For the propagation characteristic of sound emitted from blade, the noise can be heard differe