Question

Fig. 7.22 shows four waves A, B, C, and D.

Name the wave which shows

(a) a note from a musical instrument,

(b) a soft note,

(c) a shrill note

Answer 1

(a) a note from a musical sound is shown by (D)
(b) a soft note is shown by (A)
(c) a shrill note is shown by (C)