Giving sound a voice starts with being able to hear it
Noise damage doesn’t make the world quieter. It takes the high frequencies first — the consonants that turn sound into words — and it doesn’t come back. Hearing Rocks is PAMA’s campaign to keep the people who make sound able to hear it.
Healthy hearing. Every consonant is there — the s, t and f that tell “fifteen” from “fifty.”
Early damage usually starts as a dip around 4 kHz. Most people don’t notice yet — but in a noisy room they start working harder to follow.
The dip widens and the highs fade. Vowels survive; consonants don’t. Voices are loud enough, but no longer clear.
Severe loss. The voice is still there; the words are not. Hearing aids help, but nothing restores what noise took.
A simplified simulation, not a hearing test. NIOSH’s fuller simulator is linked below.