The sound generated is weak when the amplitude is tiny.Ģ6. What happens to the sound when the amplitude of vibration is large and vice versa?Īns : Because the loudness of sound is determined by its amplitude, so the sound produced is loud when the amplitude of vibration is significant. It is said that “The loudness of sound depends on its amplitude”. A whistle, on the other hand, has a high frequency and hence generates a higher pitch sound.Ģ5. As a result, it makes a low-pitched sound. Give an example to show that the frequency determines the shrillness or pitch of a sound.Īns : A low-frequency vibration is produced by a drum. Now carefully place your ear on the water's surface you will hear the ringing bell, proving that sound can travel through water. Explain with an activity that sound travels in liquids.Īns: Fill a bucket with water and, using one hand, shake a bell under the water, making sure the bell does not touch the bucket's body. Sounds of frequencies more than 20 Hz but less than 20,000 Hz cannot be detected by the human ear.Īns: Sounds of frequencies more than 20 Hz but less than 20,000 Hz can be detected by the human ear.Ģ3. Noise is one which is pleasing to the ear.Īns : Musical sound is one which is pleasing to the earĢ2. Desert coolers, sound produced by harmonium, string of sitar, television and transistor radio at high volumesĪ. Classify the following into music and noise. The decibel is a measurement of how loud something is (dB).ġ8. For example, doubling the amplitude increases the loudness by a factor of four. Briefly describe the loudness of sound.Īns: The Square of the amplitude of the vibration producing the sound determines the loudness of the sound. Sound cannot travel through a _.Īns : Sound cannot travel through a vacuum.ġ7. What would be the sound produced in a bus station or railway station called as?Īns: Unpleasant noise will be produced in both locations, which is known as noise.ġ6. Give two examples of noise pollution.Īns: During an event, the use of crackers and loudspeakers. For the human ear, the range of audible frequencies is roughly from _ to _ Hz.Īns: 20 to 20,000 is the range of audible sound for the human ear.Īns : Noise is the name given to unpleasant sounds.ġ4. In humans, sound is produced by the _.Īns : in humans, sound is produced by the Voice box or larynxġ2. _ and _ are two important properties of any sound.Īns: Amplitude and frequency are two important properties of any sound.ġ1. To and fro motion of an object is called _.Īns : Vibration is the to and fro motion of an object.Īns : Frequency is the number of oscillations made per second.Īns: Hertz is a unit of measurement for frequency. Sitar is the instrument which produces sound through vibration.ħ. Which one of the following instruments produces sound through vibrations?Īns: D. Frequency of vibration determines the shrillness of a sound.Ħ. Shrillness of a sound is determined by_ of vibration.Īns : B. Which one of the following will have long vocal cords?ĥ. amplitude is the property on which loudness of the sound depends upon.Ĥ. The loudness of sound depends upon _.Īns :A. 20 Hz to 20,000 Hz is the range of audible sound for a human being.ģ. The range of audible sound for a human being is _.Īns: A. All of these act as a medium for propagation of sound.Ģ. Which one the following acts as a medium for propagation of sound.Īns: D.
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