Can you hear me now?

My father celebrated his 100th birthday this year. With all the loud noises he's experienced in his life he needs a hearing aid. Actually most of his hearing loss happened while working at a sawmill.
Back in his time many people worked in factories, today this has changed through technology, but hearing loss still remains high.
With the advent if the inconspicuous earbud people walk around with them on like they're necessary for life. Problem though is that the high volume played through those earbuds is causing hearing loss.
Users of earbuds should keep the volume to 60% and at most 75%. this will limit hearing loss. The iPhone at full volume can produce some 100 decibels. Therefore keep your volume down and keep your hearing for the rest of your life!