Does the use of earphones harm hearing?

How? Does it cause hearing loss? Or any other diseases?

How does it affect hearing?

If it causes diseases, what diseases?

Does the intensity of the damage depend on the volume and frequency of the sound?

What is the highest volume of sound that a man can be exposed to without getting harmed?

What are the highest and lowest frequencies that a man can be exposed to without getting harmed?

Does the intensity of the damage depend on the time that the man is exposed to the sound?

What is the longest time that a man can be exposed to the sound?



Thanks.