Frequency of a sound determines the shrillness or pitch of the sound. Shrillness or pitch increases with increase in frequency of sound. Sound with greater frequency is shriller and has higher pitch.
What does the shrillness of a sound depend on?
The shrillness of a sound depends upon frequency. The shrillness of a sound depends upon frequency. Pitch is the characteristic of a wave by which sound wave appears shrill or grave. It depends upon the frequency of the wave.
Does loudness of sound depend on amplitude of vibration?
The loudness of sound depends on the amplitude of vibration. 5. What is the ‘frequency’ of a vibrating object? How is it related to shrillness of sound’
What is the frequency of sound produced by vibration?
If the amplitude of vibration is large, the sound is feeble. For human ears, the audible range is 20 Hz to 20,000 Hz. The lower the frequency of vibration, the higher is the pitch. Unwanted or unpleasant sound is termed as music. Noise pollution may cause partial hearing impairment. Answer: Question 4. Fill in the blanks with suitable words.
What is the frequency of sound in Hz?
If the amplitude of vibration is large, the sound is feeble. For human ears, the audible range is 20 Hz to 20,000 Hz. The lower the frequency of vibration, the higher is the pitch.
What determines the shrillness of a sound?
The characteristics of sound which depend on frequency are called the pitch of a sound or shrillness of the sound. If the frequency is high, the sound is shrill and has a higher pitch.
How are frequency and pitch of sound related to class 8?
The sensation of a frequency is commonly referred to as the pitch of a sound. The pitch of the sound we hear depends on the frequency of the sound wave. A high frequency sound wave has a high pitch, and a low frequency sound has a low pitch. Was this answer helpful?
How is shrillness or pitch of sound determined class 8?
Correct Answer: Option (A) Frequency. The shrillness of a sound is determined by the frequency of vibration.
What is frequency of a vibrating object?
The number of cycles that a vibrating object completes in one second is called frequency. The unit of frequency is hertz (Hz). One hertz equals one cycle per second.
What is frequency of sound Class 8?
What is Frequency of Sound? The number of oscillations per second is known as the frequency of oscillation. Its unit is hertz and is denoted by Hz. The frequency of a wave in general means how frequently the particles of a medium vibrate when a wave moves through the medium.
How is sound related to frequency?
Frequency, sometimes referred to as pitch, is the number of times per second that a sound pressure wave repeats itself. A drum beat has a much lower frequency than a whistle, and a bullfrog call has a lower frequency than a cricket. The lower the frequency, the fewer the oscillations.
What is the difference between shrillness and pitch?
The pitch of a sound is our ear's response to the frequency of sound....Difference between Pitch and Loudness.LoudnessPitchLoudness is independent of the change in frequencyPitch is dependent on the change in the frequency. As the frequency increases, the shrillness of the sound increases2 more rows
How does frequency affect the quality of sound Class 8?
The higher the frequency of the waves the higher will be the pitch of the sound that we hear. If the pitch of the sound is high the sound is said to be shrill and if the pitch is low, then the sound is flat.
What is the unit of frequency?
hertz (Hz)The number of periods or cycles per second is called frequency. The SI unit for frequency is the hertz (Hz).
How is frequency produced?
The total number of waves produced in one second is called the frequency of the wave. The number of vibrations counted per second is called frequency. Here is a simple example: If five complete waves are produced in one second then the frequency of the waves will be 5 hertz (Hz) or 5 cycles per second.
What is the natural frequency of the human body?
about 7.5 HzHuman Vibration Parameter Comparison and Result Discussion. According to the existing research, the natural frequency of a human-standing body is about 7.5 Hz, and the frequency of a sitting posture in the cab is generally 4–6 Hz.
What is meant by frequency Class 8?
Frequency: The number of vibrations made by the vibrating body in one second is known as its frequency. The SI unit of frequency is the hertz (Hz).
How do you find the frequency of a class 8?
Frequency = (Number of Oscillations)/ (Time taken)Frequency = (40/4) =10Hz.
What is sound explain in brief class 8?
Sound is defined as the vibrations that can travel through any medium like air and can be heard when the vibrations reach an individual or an animal's ear. Musical sound is a sound which produces a pleasing effect to the ear while noise is defined as a sound that creates a jarring or an unpleasant effect.
What is the frequency of a vibrating object how is it related to sound?
2) Frequency is the speed of the vibration, and this determines the pitch of the sound. It is only useful or meaningful for musical sounds, where there is a strongly regular waveform. Frequency is measured as the number of wave cycles that occur in one second. The unit of frequency measurement is Hertz (Hz for short).
How does loudness affect vibration?
This shows that loudness of the sound produced by a vibrating object depends on the amplitude of vibration. Loudness is proportional to the square of the amplitude. Thus, if the amplitude is increased by three times, the loudness increases by nine times. 2.
What is the number of oscillations per second of a vibrating object called?
The number of oscillations per second of a vibrating object is called its time period.
Why do we make sound in the larynx?
Ans: Humans produce sound in the larynx due to vibrations in the vocal cords. Vocal cords are folds of tissues with a slit-like opening between them. When we speak, air passes through the opening and the vocal cords vibrate to produce sound. 5 Name the three type of musical instrument .
What causes air molecules to vibrate?
Ans: A vibrating object causes air molecules to vibrate. This creates regular compression and rarefaction in till sound reach to ear. When sound vibrations reach our ear, pinna collects the sound wave and passes into the ear canal. These waves then strike the eardrum, which starts vibrating with the same frequency.
How do vocal cords make sound?
13.12). When lung force air through the slit, the vocal cords vibrate, producing sound. Muscles attached to the vocal cords can make the cords tight or loose.
What is sound produced by?
Ans: Sound is produced by rapid to-and-fro movements called vibrations.
Where must noisy operations be conducted?
The noisy operations must be conducted away from residential areas.