Sound Level Conversion (SLC 80): The testing regime set out by the Australian standard requires that test subjects fit earplugs based on package instructions (without professional assistance) to determine their effectiveness in the hands of the average person. While we do have a standard that applies to all earplugs (AS/NZS 1270), which is displayed as an SLC 80 rating (see below), manufacturers aren't required to put this attenuation value on the packet (unless they wish to demonstrate compliance with the standard). In this instance, SNR attenuation differs depending on the earplug size (small or medium Is there an Australian standard? Most packages display at least one of these systems, as they're typically manufactured outside Australia: Unfortunately, working out the exact attenuation is tricky, as different countries have different standards and ratings. This number is called an attenuation value. For example, earplugs rated at 12dB will drop the volume in a 100dB environment (such as a concert or club) to 88dB. How much noise do they filter out?įiltered earplugs reduce volume by the number presented on the package, they do not drop decibels to that amount. Passive models may not sound quite as good, but they should suit most average ears at around half the price or less, and you don't have to buy batteries. Passive: Rely on special designs to absorb and filter volume by applying reduction at specific frequencies, in any environment.Īctive earplugs can theoretically deliver superior sound quality, but at a high cost.
Active: Use a tiny inbuilt microphone to retain sound quality by analysing the environment to reduce specific frequencies, similar to noise-cancelling headphones.There are two variations available: active and passive. The material forms a seal around the canal, while filters reduce the volume. See filtered earplugs review How do they work?įiltered earplugs fit into your ear like a pair of in-ear headphones. The NOISE (Non-Occupational Incidents, Situations and Events) database is a great government resource that lists the decibels and safe exposure period for a number of activities and environments. Earplugs are not the solution to the problem of excessive noise, but a good quality pair can be a cost-effective part of the solution. If you were to wear a pair that reduces volume by 15dB in a 100dB environment such as a concert, you're still within the range where permanent hearing loss can occur during extensive or repeated exposure. Although these earplugs can prevent hearing loss, they won't provide total protection, particularly during prolonged exposure. Standard and filtered earplugs reduce the level of decibels going in, extending the safe exposure period. Other environments and machinery that can damage your hearing without protection include: Source As volume increases, safe exposure time shrinks while the risk of hearing loss increases. Damage can start to occur around 85dB, aka the volume of most vacuum cleaners and heavy traffic. Volumes below 75dB are considered safe – these include hanging around the house, outdoor picnics and dinner parties with a handful of people. In fact, you'd be surprised at how loud some day-to-day activities are, and the impact that these can have on your hearing. It doesn't take much to damage your ears.