Geses

Sound can travel through any phase of matter – solid, liquid, or gas.

The sound is produced because of three main elements. They are the transmitter, the transmission medium, and the receiver. Vibration: When sound moves through matter such as solid, liquid, and gas, the molecules of the matter move to and fro in the direction in which a wave is traveling.

Sound waves are characterized into three types. Audible sound waves are those that humans can hear. Infrasonic waves are those that are too low-frequency (below 20 Hz) for humans to hear. Ultrasonic sounds waves are those that are too high-frequency (above 20,000 Hz) for humans to hear.

Properties of Sound

• Property 1: Pitch/Frequency. The perception of frequency of sound by human ear within the range of human hearing is called the pitch.
• Property 2: Amplitude/Loudness. The amplitude of the sound waves determines its loudness.
• Property 3: Speed.
• Property 4: Reflection of sound.
• Property 5: Timbre.

“Hissing” is the sound of gas.

Natural gas, some of which is seen burning here, is often found near deposits of oil and coal. Oil, coal, and natural gas are fossil fuels. Natural gas is a fossil fuel. Like other fossil fuels such as coal and oil, natural gas forms from the plants, animals, and microorganisms that lived millions of years ago.

Because the molecules of matter in a gas are spaced far apart, sound moves slowest through a gas. Sound travels faster in liquids than in gases because molecules are packed more closely together.

Sound propagates in gases. No reflection at all. At an air-water boundary reflecting is caused by the great difference in density of the two media. An air-solid boundary is the most interesting, and the most common.

Pure tones, harmonics, periodic and non-periodic sounds; Timbre, spectrum, envelope and transients.

Sample answer: The different types of noise include physical, semantic, psychological, and physiological.

Since sound is a wave, it has all of the properties attributed to any wave, and these attributes are the four elements that define any and all sounds. They are the frequency, amplitude, wave form and duration, or in musical terms, pitch, dynamic, timbre (tone color), and duration.

Learn about the primary waveforms that make up the basic ingredients of sound; sine wave, square wave, triangle wave, and sawtooth wave.