Chronon

  In our previous blog of the series, we talked about ‘Reflection of sound’. Today we are going to discuss about ‘Application of Ultrasound’. In our previous blogs of the series, we discussed about some features of sound. From the discussion we are familiar with the concept of sound as a form of vibrational waves. These sound waves are measured in the term of amplitude and frequency. Sound waves are categorized in different frequency ranges. The range of 20 Hz to 20 kHz of sound waves are audible sounds and are known as Acoustic. Sound waves having frequency lower than 20 Hz is known as Infrasound and the sound having frequency greater than 20 kHz is known as Ultrasound. Ultrasound is not audible to human ear. Human ear is limited to sense only the sound waves of acoustic frequency range. But in nature and human life, ultrasounds have many applications. We are going to discuss some of them. ·          Cleaning Ultrasound waves are us...

  In our previous blog of the series, we talked about ‘Production and propagation of sound’. Today we are going to discuss about ‘Reflection of sound’. The term ‘reflection’ is defined as ‘throwing back of an object from a surface’. This term is frequently used for light, heat, and sound waves. In short, every wave propagation if strikes a surface and bounces back without absorption, will be termed as reflected wave. Whenever any form of wave strikes any wall or surface it bounces back in a straight line. In this phenomenon angle of reflection remains same as angle of incidence. This reflection of sound sometimes makes a set of reflected waves and compose them in a new constructive sound wave. Some of them are under discussion below. Echo We are very much familiar with the phenomenon of hearing same voices coming back again and again. This phenomenon can be easily observed in hill areas or in a big empty house. The phenomenon is defined as ‘the repetition of sound that is caused by...

  In our previous blogs of the series, we talked about ‘Works Energy and Power’. Today we are going to discuss ‘Production and propagation of sound’. Production of Sound We are very much familiar with the term sound in our daily life. We have already heard different kinds of sound from various sources and developed our senses to recognize and differentiate them. In physics, the term sound stands for ‘a form of vibration’. The relation between sound and vibration can be simplified after analyzing the sound very closely. It can be observed that every source of sound is a pure source of vibration. Whenever that source produces vibration, in a specific frequency range, we can sense that vibration with our ears. If that vibrational frequency is more or less than that frequency range, we couldn’t sense that with our ear, but we can absolutely sense them with our skin. Everything that can produce vibration is a source of sound. Because sound is nothing but a form of vibration of a specifi...