PA Mil-Base Industries Inc ., New Cumberland, won a $ 97, 258 contract from the Defense Supply Center, Columbus, Ohio, to provide acoustic devices.
22.
Soundscapes from a computerized acoustic device with a camera may also offer synthetic vision to the blind, utilizing human echolocation, as is the goal of the seeing with sound project.
23.
A "'homing beacon "'is a radio or acoustic device that allows the user to track a ship, aircraft, an animal, or another individual.
24.
And some are meant to be heard : The department's new Long Range Acoustic Device is a 45-pound mega-megaphone that can shout announcements to crowds several blocks deep.
25.
He has made sure that everyone knows what to expect ( crowd-controlling hardware from handcuffs to $ 35, 000 acoustic devices that emit ear-piercing shrieks at the demonstrators ).
26.
In 1928, he constructed the " pseudophone ", an acoustic device that induced a form of auditory illusion by distorting the direction from which an audible sound appeared to originate.
27.
Modern sonic weapons such the Long Range Acoustic Device ( LRAD ) rely on multiple loudspeaker drivers for increased sound power, and may array them in a flat plane rather than on a parabolic surface.
28.
The acoustic device rises into its reflective position only when the night-blooming flowers are ripe for pollinating, thereby discouraging bats from visiting a flower that isn't ready to give up its pollen.
29.
On December 5, 2014, the NYPD used a Long Range Acoustic Device ( LRAD ) to disperse about 100 protesters who were on the streets protesting the police killing of Eric Garner in Midtown Manhattan.
30.
Small spherical " point-source " acoustic devices follow the known inverse square law, which predicts the loss of 6 decibels ( dB ) per doubling of distance from the source, solely due to geometric spreading.
