1. PERCEPTION OF SOUND
In the context
of Biology

2. A SOUND IS…….
Vibrations that travel through
the air or another medium and
can be heard when they reach a
person's or animal's ear.

3. So how we know it’s a sound
We don’t have
ultrasonic eyes
to view sound
so what is the
factors which
make sure it’s
sound, it’s the

4. What Is the ear about
 Auditory organ of
humans
 It has three parts
namely
 Outer ear(pinna, ear
canal, surface of
ear drum)
 Middle year(