NASA is aiming for a sound level of 60 to 65 A-weighted
decibels (dBa), which is roughly the volume of a highway-bound luxury car or background conversation in a lively restaurant.
For rattle noise evaluation, two physical acoustics parameters (including linear sound pressure level and A-weighted
sound pressure level) and six psychological acoustics parameters (including loudness, roughness, sharpness, fluctuation strength, tonality and articulation index) are chosen for further objective evaluation  and calculation results of each gear rattle noise sample are listed in Table 7.
W,j] is the A-weighted
sound power level of each vehicle type; for example, [L.
Studies have indicated that equivalent continuous A-weighted
sound pressure level over 8 h (L [sub]Aeq,8 h ) and exposure time are two important parameters that describe the relationship between the steady noise and hearing loss.
103 dB rms noise, 20 Hz to 20 kHz BW, A-weighted
The noise signal is measured with an rms detector across a specified bandwidth.
The sound time history of traffic flow in the chosen representative time interval is registered on both microphones simultaneously, as the two discreet sets of instantaneous A-weighted
sound pressure levels [L.
An average living room would typically have a noise level of about 40 A-weighted
Given the absence of a hospital noise standard, it is seen that on the measurements in literature vary from A-weighted
Acoustic and environmental impacts from Performance Based Procedures are evaluated by the software, which provides a display of noise impacts using various acoustic parameters including A-weighted
noise levels and audibility detection.
The recommended basic methods for evaluating acoustical performance of commercial buildings include an occupant survey to identify perceived acoustical problems in the building and a survey of the A-weighted
sound pressure level (Leq in dBA) in occupied spaces.
Sound pressure levels measured in the ear simulators of the HATS must be corrected to free field response and then A-weighted
The initial report (1) provided the maximum instantaneous A-weighted
sound pressure level (Lmax Fast [dBA]) averaged for 2 recordings during single vuvuzela blasts at 4 distances from the bell of the vuvuzela.