Question

1. Define amplitude.
2. Define frequency.
3. Give the difference between audible and inaudible sound.
4. Define time period.
5. What is meant by loudness?

Answer 1

Answer:

1)=The amplitude of a periodic variable is a measure of its change in a single period. There are various definitions of amplitude, which are all functions of the magnitude of the differences between the variable's extreme values. In older texts, the phase of a period function is sometimes called the amplitude

2)=Frequency is the number of occurrences of a repeating event per unit of time. It is also referred to as temporal frequency, which emphasizes the contrast to spatial frequency and angular frequency. Frequency is measured in units of hertz which is equal to one occurrence of a repeating event per second

3)=Audible sounds are sounds of frequency which are audible to human ear. However, on the other hand, inaudible sounds are those sounds who have frequency not audible for human ear. The frequency of audible sounds is usually 20-20,000 hertz, while that of inaudible is above 20kHz(kiloHertz).

4)=The time period is the time taken by a complete cycle of the wave to pass a point, Frequency is the number of complete cycle of waves passing a point in unit time.

5)=More formally, it is defined as, "That attribute of auditory sensation in terms of which sounds can be ordered on a scale extending from quiet to loud." The relation of physical attributes of sound to perceived loudness consists of physical, physiological and psychological components.

Answer 2

Answer 1) amplitude : the greatest distance that a wave, especially a sound or radio wave, moves up and down .

Answer 2) frequency : the number of times something happens in a particular period .

Answer 3) Inaudible And Audible Sound : Human ear cannot detect sound frequencies less than 20 vibrations per second i.e. 20 Hz. ... The low-frequency sound which the human ear cannot detect is also known as infrasonic sound. Whereas the higher range inaudible frequency is also known as ultrasonic sound.

Answer 4) A time period (denoted by 'T' ) is the time taken for one complete cycle of vibration to pass a given point. As the frequency of a wave increases, the time period of the wave decreases.

Answer 5) The loudness of a sound is a perceptual measure of the effect of the energy content of sound on the ear. ... So a sound that is as loud as a 1kHz tone with a sound pressure level of 40dB (for example) is said to have a loudness level of 40 phon.

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