The acoustics of vowels can be visualized using spectrograms, which display the acoustic energy at each frequency, and how this changes with time.
22.
The flat position eliminated the problem of acoustic energy radiating from the back of the enclosure, smearing the forward output with multi-path arrival times.
23.
When a noise is closer to one ear than the other, its acoustic energy will reach that ear faster and louder than the other ear.
24.
Recording is by mechanical means and the vibrations from acoustic energy, transferred to a cutting needle, make the needle cut a deeper or shallower groove.
25.
Acoustic energy is variation in the air pressure that can be represented as sound waves, which are then perceived by the human auditory system as sound.
26.
Pressing a key on the piano's keyboard causes a padded ( often with felt ) hammer to strike steel couples the acoustic energy to the air.
27.
The original device is based upon a suspension of asymmetric particles in a thin fluid layer which, when acted upon by acoustic energy, produce visual reflectivity changes.
28.
Since the ultrasonic transducer is used both for transmitting and receiving the acoustic energy, it is subject to a period of mechanical vibration known as ringing .
29.
Sound can travel through water for enormous distances, prevented from dissipating its acoustic energy by boundaries in the ocean created by water layers of differing temperatures and densities.
30.
This also minimizes the negative effects of acoustic energy that would otherwise ( as with a sealed enclosure ) be reflected back to the driver in a sealed cavity.
