# 3 properties of sound waves. IGCSE Physics : Topic 3 Properties of Waves, Including Sound and Light 2019-02-26

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## IGCSE Physics : Topic 3 Properties of Waves, Including Sound and Light

You want to know the scary part? For example, when you sing in a high-pitched voice you are forcing your vocal chords to vibrate quickly. A pendulum bob that ispulled to the side and released swings a few times and then comesto a stop typically, its amplitude undergoes a continuous decay because of friction in the air and in its pivot. What is common to all oscillatory motion is that, after a time, themotion repeats itself. How can this be done? When introducing the topic, try to ask questions that will help you determine if your students have these misconceptions. In sound, the frequency is also known as Pitch. These compression and rarefaction propagate through air. But throughout the 19th century, scientists persisted in depicting sound waves as transverse waves, or those that move energy across a medium, such as air, while causing the particles to move up and down.

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## Characteristics Of Sound Waves: Amplitude, Frequency, Wavelength And Timbre

Atoms, molecules, and solids all have charges that vary in quality sign and degree of binding and quantity among them. Well it depends on your room. Sound can also be created by vibrating an object in a liquid such as water or in a solid such as iron. French, called waves and oscillations, to learn more about waves at an early undergrad level. Ourvisualsystem happens to respond to this frequency of photons bygenerating electric pulses in the visual nervous system, which isinterpreted by our brain as sight, as was already discussed. Longitudinal waves Sound waves are - the vibrations are in the same direction as the direction of travel.

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## 3. Properties of waves, including light and sound Flashcards

The tone of a sound wave can be recognized by the regularity of its vibration. As the air is evacuated from the jar,the sound of the bell diminishes and finally the bell becomesinaudible. They work as variations of pressure in a medium such as air. As the cochlear fluid vibrates, it moves thousands of tiny hair-like nerve cells that line the cochlear walls, which serves to convert the mechanical energy of the ossicles into the requisite electrical nerve impulses. It contains a long bundle of optic fibres. Its speed oftravel in air is also dependant on the air pressure, temperature,and humidity.

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## Properties of Waves

Another way is in quality. The understanding of science is very similar to this. The electric force thatacts between charges has significant differences from the magneticforce that results in the interaction of magnets. Applications Sound waves: There are many applications including musical instruments, ultrasound scanning, ultrasound cleaning, sonar devices, in mineral explorations, in petroleum explorations, in consumer electronics and for hearing. For example, X-rays of the frequency used inmedicine penetrate through most tissue, except the denser bones ortumors. The larger the amplitude, the greater the oscillator'senergy.

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## 3 properties of sound

Waves have frequencies, wavelengths, amplitudes, wave speeds, intensities, timbres and directions. Another student should stretch the jump rope out taut, horizontally. The sound waves that reflect from objects are used to detect objects on or under the surface of the water. Pitch and loudness are two ways that sounds are different. Long Answer: Specifica … lly, for basically all substances, the speed of sound equals the square root of the ratio of the elastic constant divided by the density. When talking about waves, the amplitude of a wave is the maximum height of a wave measured from its rest position. This compression and expansion create a minute pressure difference that we perceive as sound.

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## Characteristics Of Sound Waves And Properties Of Sound Waves

But by the end, the sound seemed more like light waves. It is labeled in the image above. Another way that energy and momentum get transferred is whenobjects i. Once students have finished watching the video, discuss the questions on the student sheet. Write and draw your response. Amplitude refers to the distance of the maximum vertical displacement of the wave from its mean position.

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## What Are the Different Properties of Sound?

Echolocation is an example of a specialized sound detection system. For example, three buses an hour might be the frequency of buses on one route. These compressions and rarefractions comprise of the sound wave. Speed in air Sound waves: Speed of sound in air increases with the temperature. How much energy is being worked in a room based on the dimensions, the ratio, height, width, length? The amplitude is how tall the wave is.

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## 3. Properties of waves, including light and sound Flashcards

Sound waves have the ability to bend around obstacles. The usual simple longitudinal compression waves that we are familiar with as sound detected by our ear are what we usually mean by the word sound, but there are also transverse matter vibrations also called shear waves. In this view, when a charge changesposition, the field that it produces also changes in space. . This addition of disturbance,which does not affect the original waves, is purely a wavephenomenon and is called interference.

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## What Are the Characteristics of Sound Waves?

It is interesting to note that forcingwith different frequencies can have different results, even thoughthe amount of the force may be held fixed. Radar therefore uses radio waves instead of sound. For this reason you cannot have sound waves in a vacuum including space. They are not heard separately, but add to the tone of the sound, making an oboe sound different from a trumpet or drum. A light typically shines upon the ripple tank from above and illuminates a white sheet of paper placed directly below. Human ears detect a large range of frequencies from to 20 to 20,000 Hz. All of these ranges of frequencies together is referred toas theelectromagnetic spectrum.

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## Properties of Waves

Watch the video below to visualize these waves. With waves, frequency is how many peaks go past in a given time, usually one second. They both kind of separate and go their own way and this is the difference that you have to realize. Context Sound is an important concept in science. The shape of the pinna is ideal to collect the sound waves, direct them down the ear canal, and vibrate the tympanic membrane, or eardrum. They understood that sound is a series of compressed air, characterized by sound molecules close together, followed by rarefied air, in which the molecules are farther apart.

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