Because the decibel (dB) scale is logarithmic, every 3 dB increase doubles the sound energy hitting your eardrum, cutting your safe listening time in half. Use this clinical reference guide based on Australian occupational acoustic standards:
Sounds at or below 70 dBA (such as normal conversation at 60 dB or background household noise) are completely safe for unlimited listening. Once noise reaches 85 dBA (heavy traffic, lawnmowers, noisy workshops), permanent cochlear hair cell damage can occur after 8 hours of continuous exposure.
At 60 dB, you can listen indefinitely without risk. At 90 dB (power tools, motorcycle), safe exposure drops to a maximum of 2 hours per day. At 100 dB (headphones at full volume, nightclub, chainsaw), permanent inner-ear damage can begin in just 15 minutes without hearing protection.
Repeated daily exposure to loud music (>85 dB) overworks the microscopic outer hair cells inside the cochlea. Initially, this causes a 'temporary threshold shift' (muffled ears and ringing after a concert), which eventually hardens into permanent noise-induced hearing loss and chronic tinnitus.
Medical-grade custom-molded silicone earplugs last between 3 and 5 years with proper care. Because they are crafted from an exact impression of your ear canals, they deliver superior decibel attenuation and all-day comfort compared to disposable foam plugs.
Whether you work with machinery, ride motorcycles, play live music, or want peaceful sleep, we custom-mold medical-grade earplugs across Northern Tasmania.
Explore: Explore Custom Earplugs | Our Tasmanian Clinic Locations