Intensity

Question 1

What is the human frequency range?

Answer 1

20 Hz to 20,000 Hz. As you get older the upper limit decreases.

Question 2

When is the ear most sensitive?

Answer 2

3,000 Hz. For any given intensity, sounds of this frequency will be the loudest.

Question 3

Intensity range

Answer 3

10-12 Wm-2 to 100 Wm-2

Question 4

Threshold of feeling

Answer 4

1 Wm-2

Question 5

Perceived loudness

Answer 5

The perceived loudness of sound depends on its intensity and its frequency

Question 6

Relationship between the perceived loudness and the intensity

Answer 6

Relationship is logarithmic

As the loundness goes up in equal intervals if intensity increases by a constant factor.

Question 7

Defects of hearing

Answer 7

-As you get get older your hearing deteriorates, but higher frequencies are affect most
-Ears can be damaged by excessive noise
For a person with hearing loss, higher intensity levels are needed for the same loudness.