How long should you use your earphones for without damaging them?

Alka Yagnik has been diagnosed with a rare hearing disorder called sensory neural nerve hearing loss. 
 

Alka Yagnik made an appeal to people through social media, talking about the dangers of using earphones and headphones for long periods. 
 

The use of headphones and earphones has significantly increased over the years. 
 

An old study by France’s National Institute of Health and Medical Research showed that a significant population of France have been diagnosed with this hearing loss.
 

Experts suggest that earphones and headphones should not be used for more than 15-20 minutes at a time. 
 

According to experts, the volume for headphones should not exceed 85 decibels.