A pretest is usually performed using a simulator to confirm the specified overall sound pressure level and spectrum can be achieved.
22.
The strength of echo is frequently measured in dB sound pressure level ( SPL ) relative to the directly transmitted wave.
23.
The record was broken by the crowd at Arrowhead Stadium on October 13, 2013, with a sound pressure level of 137.57 decibels.
24.
The efficiency of all of these products originally provided high sound pressure levels from the limited amplifier power available at the time.
25.
Speech recognition threshold ( SRT ) is defined as the sound pressure level at which 50 % of the speech is identified correctly.
26.
This is because most electrostatics are line sources, the sound pressure level of which decreases by 3 dB for each doubling of distance.
27.
Furthermore, the sound pressure level can be easily modified by adjusting the physical pressure level of the smartphone pressed against the outer ear.
28.
In the 1930s, loudspeaker manufacturers began to combine two and three bandpasses'worth of drivers in order to increase frequency response and sound pressure level.
29.
These Transmission Loss values are then plotted on a sound pressure level graph and the resulting curve is compared to a standard reference contour.
30.
All of the problems with sound waves tend to increase with sound pressure level, causing significant shifts in tone as the loudspeaker changes volume.
