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trainHome trainDeafness trainAudiologyLevels of hearing loss

Levels of hearing loss

This audiogram shows 'normal' hearing.

Sounds below the lines on the audiogram can be heard.

X shows the left ear.

0 shows the right ear.

All the X and 0 are above the 20 line.  This means hearing is 'normal'.

This audiogram shows normal hearing

Range of hearing loss
A hearing loss can be mild, moderate, severe or profound.

This audiogram shows a 'mild'  hearing loss.

Sounds below the lines on the audiogram can be heard.

All the X and 0 are between the 21 and 40 lines. 

This is a 'mild' loss.

This audiogram shows a mild hearing loss

This is a 'moderate' hearing loss.

Sounds below the lines on the audiogram can be heard.  Low/loud sounds like oo, ah, ay and ee may be heard. 

All the X and 0 are between 41 and 70.

This is a 'moderate' loss.

The hearing loss in the left ear is worse than the right ear.

This audiogram shows a moderate loss

This is a 'severe' hearing loss.

Conversational speech cannot be heard.  Shouting and loud noise (like traffic) can be heard.

All the X and 0 are between 71 and 95.

This is a 'severe' loss.

 

This audiogram shows a severe hearing loss

This is a 'profound' hearing loss.

Speech cannot be heard.  Very loud noises like pneumatic drills and planes taking off can be heard (or felt). 

The X and 0 are mostly below the 95 line.  This is a 'profound' loss.

People with very profound hearing losses can feel loud low sounds.

This audiogram shows a profound hearing loss

To work out the level of hearing loss

  1. Add the Hearing Level (dB) for 250, 500, 1000, 2000 and 4000Hz in the better ear.

  2. Divide by 5.

  3. If there was no response use 120dB.

Find out more about Levels

       
Copyright Wendy Pallant 2001