it is interesting to see how the physical properties of sound correspond to our perceptions of it.Hearingis the perception of sound, just as vision is the perception of visible light. But sound has important applications beyond hearing. Ultrasound, for example, is not heard...
Hearing and sound communication in small animals: evolutionary adaptations to the laws of physics. In The Evolutionary Biology of Hearing; Webster, D.B., Fay, R.R., Popper, A.N., Eds.; Springer-Verlag: New York, NY, USA, 1992; pp. 61-78....
A Study of Decibel Reduction as Sound Passes through Common Materials [E] Active Noise Control Effectiveness - frequencies and distances. [E] The Effect of Ocean Acidification on the Acoustic Properties of Water [E] Learn about sound and hearing using a decibel meter to compare noise levels...
On this scale, 0 dBis the lower limit of our hearing, meaning we hear complete silence. The sound intensity level, β, in decibels can be determined from the intensity by the equation: B=10logll0B=10logll0 where I is the intensity you are interested in and I0I0 is a reference ...
Any sound with a frequency below the audible range of hearing (i.e., less than 20 Hz) is known as an infrasound and any sound with a frequency above the audible range of hearing (i.e., more than 20 000 Hz) is known as an ultrasound. Humans are not alone in their ability to ...
One of the important areas of scientific study in which ultrasonics has had an enormous impact iscavitation. When water isboiled, bubbles form at the bottom of the container, rise in the water, and then collapse, leading to the sound of the boiling water. The boiling process and the resulti...
of hearing forhumans. The physical property of frequency is perceived physiologically aspitch, so that the higher the frequency, the higher the perceived pitch. There is also a relation between the wavelength of a sound wave, its frequency or period, and the speed of the wave (S), such ...
Physics of Hearing Search for: Sound Intensity and Sound LevelLearning Objectives By the end of this section, you will be able to: Define intensity, sound intensity, and sound pressure level. Calculate sound intensity levels in decibels (dB). Figure 1. Noise on crowded roadways like this one...
The existence of nonauditory effects produced by music, noise and infrasound, which partly recall whole-body vibration effects, suggests that acoustic waves can affect humans not only through the auditory apparatus (cochlea, cranial nerves, brain centers), but also through other than hearing tissues...
The loudness of sound, as perceived by the sense of hearing, depends primarily on the amplitude of the pressure wave. 8. D Sounds made by the human voice and musical instruments are more complex than a sound represented by a simple sine wave. A complex wave is produced by using the ...