Question 1 Why we do not hear the screams of a bat? Question 2 What is the name of very high frequency sound which cannot be heard by human ears? Question 3 What is an audible sound? Question 4 What is an inaudible sound? Question 5 State few uses of ultrasound? Question 6 What is ultrasound? Question 7 What is the upper limit of frequency of human hearing … [Read more...] about Audible and Inaudible sound