Science Tuition- Sound

In this science tuition lesson, we will be finding out more about sound.

Sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid. The vibrating sources set the particles of a medium in vibration in such a way that sound travels outwards in the form of longitudinal waves. Some of the energy of the vibrations is transmitted over a distance.

There is a range of audible frequencies of human is between 20 Hz to 20,000 Hz. This is called the audible range of the human ear. Drums, piano, television set and human vocal cords are examples of vibrating sources that produce sound in the audible range of frequencies.

Sources of infrasonic waves with frequencies less than 20 Hz include earthquakes, thunder and volcanoes etc. The hearing ranges of elephants and whales extend into the infrasonic region.

The audible range of dogs, cats, moths and mice extends into ultrasound frequencies. They have frequencies above 20,000 Hz. For sound with frequencies above 20,000 Hz, they are in the ultrasonic range. Hence, dog and cats can hear very high frequencies that humans cannot.

Sound have different pitch and loudness. A louder sound vibrates with higher amplitude. A softer sound vibrates with lower amplitude. A higher pitch sound has a higher frequency. A lower pitch sound has a lower frequency. High pitch sound is very squeaky. A low pitch sound is an example of a man having deep voice. The speed of sound can be calculated by taking the distance dividing by the time taken.

A sound wave is a pressure disturbance that travels through a medium (gas, liquid or solid) by means of particle-to-particle interaction. As one particle becomes disturbed, it exerts a force on the next adjacent particle, thus disturbing that particle from rest and transporting the energy through the medium.

The speed of a sound wave refers to how fast the disturbance is passed from particle to particle.
Frequency refers to the number of vibrations that an individual particle makes per unit of time.

Science can be labeled as the most important subject in the world to learn. But why is so? Science is a subject that has an explanation about everything. All the phenomenon that surrounds as can be answered by Science. Science has a lot of branches and sub-branches and so this subject works as the building block for several professions and this makes it the most important subject to study. But those who are non-science students and are thinking that why should they learn Science well Science is connected with various other subjects like Economics, Geology, Geography, and even History so basic Science knowledge is highly essential.

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