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The Question & Answer (Q&A) Knowledge Managenet
The Internet has many places to ask questions about anything imaginable and find past answers on almost everything.
Researchers have gained control of the elusive “particle” of sound, the phonon. Although phonons—the smallest units of the vibrational energy that makes up sound waves—are not matter, they can be considered particles the way photons are particles of light.
Sound wave can be described by five characteristics: Wavelength, Amplitude, Time-Period, Frequency and Velocity or Speed.
Two main factors affect the speed of sound: the material that makes up the medium—such as air or water—and the temperature. If we know the medium and the temperature, however, we can predict the speed of sound.
A high intensity sound wave is characterized by vibrations of air particles with a high amplitude. When these high amplitude vibrations impinge upon the eardrum, they produce a very forceful displacement of the eardrum from its rest position. A high intensity sound is perceived as a relatively loud sound by the brain.
Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.
Low pitch. Low–pitched sounds, like the rumble of a truck, have long wavelengths. The peaks of the waves on the graph are far apart.
20 kHz
Humans can only hear sound waves between 20 and 20,000 Hz, but sound waves can still affect us below that threshold. It’s been calculated, for instance, that it would require 240 dB to make a human head explode. That’s a whole lot of decibels. It would be next to impossible to generate this level of noise.
The air here on Earth allows sound waves to move from one point to another (sound can also move through water, steel, earth, etc… it just requires that particles/atoms/molecules are touching one another). Thus there is no sound on the Moon.
Humans can generally sense sounds at frequencies between 20 and 20,000 cycles per second, or hertz (Hz)—although this range shrinks as a person ages. Prolonged exposure to loud noises within the audible range have long been known to cause hearing loss over time.