all characteristics of sound explain
Answers
Explanation:
Since sound is a wave, we can relate the properties of sound to the properties of a wave. The basic properties of sound are: pitch, loudness and tone.
Pitch
The frequency of a sound wave is what your ear understands as pitch. A higher frequency sound has a higher pitch, and a lower frequency sound has a lower pitch. In Figure 10.2 sound A has a higher pitch than sound B. For instance, the chirp of a bird would have a high pitch, but the roar of a lion would have a low pitch.
The human ear can detect a wide range of frequencies. Frequencies from 20 to 20 000 Hz are audible to the human ear. Any sound with a frequency below 20 Hz is known as an infrasound and any sound with a frequency above
20 000
20 000
Hz
Hz
is known as an ultrasound.
Loudness
The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, and a smaller amplitude means a softer sound. In Figure 10.2 sound C is louder than sound B. The vibration of a source sets the amplitude of a wave. It transmits energy into the medium through its vibration. More energetic vibration corresponds to larger amplitude. The molecules move back and forth more vigorously.
The loudness of a sound is also determined by the sensitivity of the ear. The human ear is more sensitive to some frequencies than to others. The volume we receive thus depends on both the amplitude of a sound wave and whether its frequency lies in a region where the ear is more or less sensitive.
Comparing sound generating instruments
The size and shape of instruments influences the sounds that they are able to produce. Find some instruments that have different physical characteristics and compare their sounds. You could:
Option 1: Vuvuzelas:
Compare the sounds made by blowing through vuvuzelas of different sizes. You will need to find a few different vuvuzelas. Take turns blowing the different ones, one at a time and record which you think is louder (amplitude), which is of higher pitch (frequency).
Option 2: Tuning forks:
Compare the sounds created by tapping tuning forks of different sizes.
You will need to find a few different tuning forks. Take turns tapping the different ones, one at a time and record which you think is louder (amplitude), which is of higher pitch (frequency).
Option 3: Signal generator and oscilloscope
Use a function generator connected to a speaker to produce sounds of different frequencies and amplitudes and use a microphone connected to an oscilloscope to display the characteristics of the different sounds produced.
Function generator
The function generator allows you to control the loudness and frequency of the sound being produced by the speaker. It will have controls for amplitude and frequency.
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Answer:
Explanation:
Characteristics of a sound wave can be described by its frequency, amplitude and speed .We can also differentiate sound on the basis of its quality, pitch ,loudness.
Frequency-Number of oscillations per unit time is called frequency of a sound wave .It is represented by the letter 'v'(nu). Its SI unit is Hertz.
Amplitude-The magnitude of the maximum disturbance in the medium on either side of the mean value is called amplitude of the wave,and is represented by the letter 'A'.Its SI unit is Pa.
Pitch-It is the characteristic of a sound by which we can distinguish a shrill sound from a grave sound even though both have the same loudness.It depends on the frequency of the vibration.
Loudness- is a characteristic of a sound by which loud sound can be distinguished from a soft sound even the both have the same pitch.
Quality-of sound is the characteristic which enables us to distinguish to sounds having the same pitch and loudness.
Speed-of sound is defined as distance which a point on wave travels per unit time.