Question

Fill in the blanks with suitable words. (a) Time taken by an object to complete one oscillation is called __________. (b) Loudness is determined by the __________ of vibration. (c) The unit of frequency is __________ (d) Unwanted sound is called __________ . (e) The shrillness of a sound is determined by the __________ of vibration.

Answer 1

Hint:In physics, sound is a vibration that travels through a transmission media such as a gas, liquid, or solid as an acoustic wave. Sound is the receipt of such waves and the brain's perception of them in human physiology and psychology. Only acoustic waves with frequencies in the audio frequency range (about 20 Hz to 20 kHz) elicit an auditory perception in humans. These are sound waves with wavelengths ranging from 17 metres (56 feet) to 1.7 millimetres in air at atmospheric pressure (0.67 in).


Complete answer:
(a) Time taken by an object to complete one oscillation is called time period.
A period may be defined as the amount of time it takes to complete a task. The term "periodic" refers to an occurrence that occurs on a regular basis. The period is the amount of time it takes for a periodic occurrence to repeat itself. The time it takes a particle to complete one vibration cycle is the particle's time period.

(b) Loudness is determined by amplitude of vibration.
The amplitude of a sound wave is a measurement of the wave's height. The loudness of a sound wave may be described as the greatest displacement of vibrating particles of the medium from their mean location at the time the sound is created. It is the distance between crest or trough and the mean position of the wave.

(c) The unit of frequency is Hertz. The SI unit of frequency is Hertz. Hertz = 1/second
The frequency of oscillation is defined as the number of oscillations per second. Its unit is the hertz, which is abbreviated as Hz. In general, the frequency of a wave refers to how often the particles of a medium vibrate when a wave passes over it.

(d) Unwanted sound is called noise.
Unwanted sound that is deemed unpleasant, loud, or disturbing to hearing is referred to as noise. Noise is indistinguishable from desired sound in terms of physics, as both are vibrations across a medium such as air or water. When the brain hears and perceives a sound, there is a difference.

(e) Shrillness of a sound is determined by the frequency of vibration.

Note: Peak amplitude is commonly employed in audio system measurements, telecommunications, and other applications where the measurand is a signal that swings above and below a reference value but is not sinusoidal. If the reference is zero, the peak amplitude is the signal's maximum absolute value; if the reference is a mean value (DC component), the peak amplitude is the difference from that reference's maximum absolute value.