Question

answer the following ques:

a) Technique used to determine the submarine under deep water.

b) Energy crossing per unit area per unit time

c) Parameter by which voice of two singers can be distinguished from each other.

d) Technique used to detect congenial defects and growth abnormalities in foetus.

e) Sudden changes in loudness of a sound

f) Reflection of sound

g) Sound of single frequency

h) Sound wave with frequency above audible range

i) Bouncing back of the sound in different direction in the same medium.

j) Physiological response of ear to the intensity of sound​

Answer 1

Explanation:

a)The Directional Frequency Analysis and Recording (DIFAR) sonobuoy

b)The magnitude of the energy flux S

c) timbre is the answer.

d)Ultrasonography

e) periodic changes in sound

f)echo

g) tone

h) ultrasonic sounds

i) reflection of sound

j) loudness.

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