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- Dictionarysound/saʊnd/
noun
- 1. vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear: "light travels faster than sound"
- 2. sound produced by continuous and regular vibrations, as opposed to noise.
verb
- 1. emit or cause to emit sound: "a loud buzzer sounded" Similar
- 2. convey a specified impression when heard: "he sounded worried"
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Solution: Here, I = 10−10Wperm². Thus using formula, S = 10log10 I I0S = 10log10 I I0. = 20 dB. = 20 dB. The level of sound sensation will be 20 dB. Q.2: A person whistles with the power of 0.9 ×10−4 W. Determine the sound intensity at a distance of 7 meters. Solution:
The class 8 science chapter 13 notes helps students realize the role of sound in our lives. It lays stress on how sound is helpful in communication between people. Moreover, the chapter also explains how sound gets produced. In addition to that, students will also learn how the sound travels from one place to the other.
The Sound of Music summary is a great way for students in Class 9 to learn about the chapter in short. This chapter is about two music maestros and their lives. We will learn about multi-percussionist, Evelyn Glennie and Bismillah Khan, the shehnai player. The Sound of Music summary recaps the whole chapter in a simpler and easier form.
A sound is an energy that is transmitted in the form of sound waves. When the objects vibrate, the air surrounding it vibrates and sound waves are carried. If there is no medium, then vibrations in an object will not travel through it. This is the mechanism for the propagation of sound. Browse more Topics under Sound. Human Ear
Sound energy is the energy that we create when sound waves move outward from a vibrating article or sound source. Furthermore, these waves are wellsprings of weight that travel through the air, water, or different materials like metal or wood. This kind of vitality is really a mechanical vitality source. At the point when the air atoms around ...
Echo is basically a sound heard after the sound is reflected back when the actual sound has stopped. Thus the echo is the result of reflection. If we want to hear an echo, we cannot do it in a small room, we need a large area. When we shout in a large or vacant space, the sound is reflected back. Suppose you are standing in front of a high wall ...
The speed of sound in a given medium depends on the density and elasticity properties of that medium. According to physics, more is the speed of sound greater is the elasticity and smaller is the density. Therefore, the speed of sound is maximum in solids and minimum in solids. Speed of Sound Formula. The speed of sound can be computed as,
Consider three sound waves of frequencies as given below. Sound 1: 50 Hz. Sound 2: 100 Hz. Sound 3: 200 Hz. Which of the following statements is true regarding the speeds of these sounds through the same medium?
Megaphone is a large funnel-shaped device which is used to channelize the sound in a particular direction. Sound can reflect due to hard surface. Due to this reason in big auditorium backstages have a curved surface so that sound can be better projected and heard. Sound reflection is similar to the reflection of light.
A man stands in front of a hillock and fires a gun. He hears an echo after 1.5 sec. The distance of the hill from the man is (velocity of sound in air=330m/s) A.
