Investigation of Rotor-Airframe Interaction Noise Associated with
This observation is further contradicted by the A-weighted OASPL trend for the same cases in Figure 11(f) in which the conical airframe case has an OASPL
Measurement of Noise in Armoured Personnel Carriers
increased vehicle weight and modified running gears with one additional The A-weighted OASPL measurements at the driver's station indicated that the ...
Launch Noise Study for the Wallops Flight Facility Programmatic
maximum A?weighted OASPL in decibels. Lmax maximum unweighted OASPL in decibels. Lpk peak sound pressure level in decibels.
Noise Measurements From Ground Tests of the Moog SureFly Vehicle
A-weighted OASPL values are also included. Applying the A-weight filter eliminates the sensitivity to the low frequency levels. Figure 23 through Figure 25 show
Acoustic Wind Tunnel Measurements of a Quadcopter in Hover and
Depending on vehicle attributes such as size weight
Analysis of Contributions of Car Body Sealing System to Vehicle
Using the A-weighted OASPL measured at four outboard ear positions Figure 7 and 8 show the influence of different leak noise sources to interior noise at
Rotor-on-Rotor Aeroacoustic Interactions of Multirotor in Hover
Figure 11: Unweighted and A-weighted OASPL directivity predictions of DJI 9443 single-rotor compared to experimen- tal measurements (black markers).
Rotor-on-Rotor Aeroacoustic Interactions of Multirotor in Hover
19 (bottom) increasing the. A-weighted OASPL of the ?45? microphone by about 7 dBA. Furthermore
