Lecture9: Physiology Of Hearing

Question 1

What is the Pitch?

Answer 1

The number of complete vibrations/cycles per second

Question 2

What is audible pitch/frequency range?

Answer 2

20- 20,000 Hz

Question 3

Why is the male Frequency?

Answer 3

120hz

Question 4

What is the female frequency?
250Hz

Question 5

How do you calculate intensity?

Answer 5

Loudness - volume

Question 6

What is the normal sound intensity?

Answer 6

50 dB

Question 7

What is responsible for the characteristic diff in voices?

Answer 7

Overtone

Question 8

What is Timbre (quality) detected by?

Answer 8

Higher centers

Question 9

What is the Function of the Ear Pinna?

Answer 9

Sound collection, collecting sound Over a large area and concentrating it in the smaller area of the External Meatus

Question 10

Describe the External Auditory canal?

Answer 10

A 25mm long torturous tube with 1 end that conducts sounds

Question 11

How much does the External auditory canal add to the sound?

Answer 11

15-20dB and 2-7 KHz

Question 12

What is the Tympanic membrane?

Answer 12

Physiological surface area of 55m2

Question 13

What does the Tympanic membrane do?

Answer 13

Moves in and out in response to Resonators, that being pressure changes related to sound on its exterior surface

Question 14

How does the external ear provide protection to the chochlea?

Answer 14

Decreases a person’s sens to his own speech (to mask low frequency sounds in loud environments)

Question 15

What does the Eustachian connect between?

Answer 15

The Middle ear and the Pharynx

Question 16

What is the Eustachian tube’s function?

Answer 16

The equalization of air pressure on both sides of the tympanic membrane, like when a person yawns