1.

(a) What is the upper limit of frequency of human hearing ? (b) What is the lower limit of frequency of human hearing ? (c) Name one animal which can produce ultrasonic sounds. (d) Name two animals which can hear ultrasonic sounds.

Answer»

(a) What is the upper limit of frequency of human hearing ?

(b) What is the lower limit of frequency of human hearing ?

(c) Name one animal which can produce ultrasonic sounds.

(d) Name two animals which can hear ultrasonic sounds.



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