A lot of us have permanent hearing loss. We're old and we're deaf. I offer this for the younger folks here who still have pretty good hearing.
NIOSH researchers found that, at the track, the noise reaches an unsafe level (meaning permanent hearing loss is likely) during a NASCAR race:
In less than a minute in the car
In less than two minutes in the pits and infield
In 7 to 10 minutes in the stands
Here's
the whole article.
Richard Newton
Exhaust Headers