1. Draw a square

2. Divide in half, horizontally and vertically

3. Divide each half into three

4. Divide the horizontal steps in half

5. Label the vertical lines in octave stepsfrom 125 Hz (1000 Hz in the middle).

Add name

Frequency in Hz125 250 500 1000 2000 4000 8000

6. Label the horizontal lines in 10 dB stepsfrom 0dB. Add name.

Frequency in Hz125 250 500 1000 2000 4000 8000

0102030405060708090

100110120

Hea

rin

g l

oss

in

dB

7. Shade in the area of discomfort(70 dB at 125 Hz to 110 dB between 500 and 4000 Hz

to 90 dB at 8000 Hz)

Frequency in Hz125 250 500 1000 2000 4000 8000

0102030405060708090

100110120

Hea

ring

loss

in d

B

8. Shade in the area covered by the mostimportant components of conversational

speech at the ear of a listener who is3 to 6 feet from the talker.

(300 to 3000 Hzand 30 to 60 dB)

Frequency in Hz125 250 500 1000 2000 4000 8000

0102030405060708090

100110120

Hea

ring

loss

in d

B

9. Add the “tails” to create the speech “banana”.(10 to 40 dB at 8000 Hz)(10 to 20 dB at 125 Hz)

Frequency in Hz125 250 500 1000 2000 4000 8000

0102030405060708090

100110120

Hea

ring

loss

in d

B