what is your observation when two sources are emitting sound with frequency 499 Hz and 501 Hz?
(a) Frequency of 500 Hz is heard with change in intensity take place twice.
(b) Frequency of 500 Hz is heard with change in intensity take place once.
(c) Frequency of 2 Hz is heard with change in intensity take place once.
(d) Frequency of 2 Hz is heard with change in intensity take place twice.