January 23rd, 2015

Amazing 3D Video Demonstrates Human Hearing Process

hearing protectionAll shooters, even rimfire enthusiasts, should always wear ear protection when at the range. A typical rifle gunshot is very loud — in the region of 140 to 170 decibels (the pain threshold is 130-140 db). Without ear protection, you can permanently damage your hearing during a single shooting session. We all know older shooters who are partially deaf, or who suffer from Tinnitus, because they didn’t use earplugs or muffs when they were younger.

How Humans Hear Sounds — Amazing Video Reveals All
The human sense of hearing involves multiple delicate internal membranes, bones, organs, and nerves. Shooters understand the importance of protecting their hearing, but they may not understand the bio-mechanics of human hearing. We hear sounds through Auditory Transduction. Sound waves vibrate the ear drum (tympanic membrane), but that is only the beginning. These vibrations are passed along via tiny rocker-arm-like bones to be “processed” in a spiral chamber, the cochlea. Vibrations moving through the cochlea are separated into frequencies and then sent as neural messages to the brain. It is an astonishingly complex process, one that truly seems miraculous when you examine the bio-engineering involved. In the Video below, the process of human Auditory Transduction is explained and illustrated with 3D animation. You really should watch this amazing video. By the end you will have a new-found appreciation for your ability to hear.

This remarkable VIDEO explains how humans hear sounds. We strongly recommend you take the time to watch and learn. The hearing you save may be your own!
YouTube Preview Image

Ear diagram courtesy Siemens Medical Solutions.

Permalink - Videos, News 5 Comments »
May 31st, 2013

Great Deals on Top-Rated Earplugs

Earplugs hearing protectionLooking for bargain-priced hearing protection for your gun club or shooting association? Contributing Editor German Salazar found some great deals on high-NRR earplugs.

Cooper Safety offers discount pricing on bulk packs of quality foam earplugs. The Howard Leight ‘Max’ plugs are now just $26.88 for 200 pairs, less than 13 cents a pair! These are some of our favorite foam plugs. They are comfortable and they have a 33db Noise Reduction Rating (NRR 33), the highest certified protection rating measured. Corded versions are also offered for $24.95 for ONE HUNDRED pairs (note quantity difference). Cooper also has the easy-to-insert Howard Leight Laser Lite disposable plugs. These cost just $21.95 for 200 pairs — less than 11 cents per pair. The pink/yellow Laser Lites feature a “winged” shape that some folks think is easier to place in the ear. The Laser Lite plugs are rated at NRR 32, slightly lower than the Howard Leight ‘Max’ plugs.

Re-Usable SmartFit Conforming Plugs
If you prefer a re-usable type of earplug, we recommend the orange Howard Leight SmartFit corded plugs. These three-flange plugs employ Conforming Material Technology (CMT) so the orange insert actually softens and conforms to your ear canal as it warms with with body heat. The longer you wear them the better they fit. They are a little stiff when you put them in initially, however they quickly form-fit and become much more comfortable, with a very good seal.

Earplugs hearing protection

Howard SmartFit ear plugs have a 25 dB Noise Reduction Rating (NRR 25). However, this Editor uses them regularly (I keep two sets in my range kit) and they really seem at least as quiet as most soft foam plugs. SmartFits are easily cleaned with warm water. These corded SmartFit plugs typically sell for a couple bucks at gunshops. You can save big-time by buying in bulk. Amazon.com sells 100 pairs of corded SmartFits for $68.95 (with free shipping). Each pair comes in a small carry-case.

Because SmartFits have a short stalk attached to the cord, they are easier to put in and take out over the course of a day. I prefer to use SmartFit plugs in situations where I’ll spend most of my time well away from the firing line (as when in the pits). I then insert them when I get closer to the action. In my experience, these are exceptionally effective when inserted properly. Though they have a lesser NRR than some foam plugs, in my ears, nothing silences noise better (once they’ve formed to fit). Others agree: “I have used many earplugs working in the offshore industry. I find these [SmartFits] far superior to others I have used. Tip — if you wet the end of the plug, they go in very easy and to the depth you need — Rick, Safety System Services”. You may want to try a pair — but be aware, some people can’t tolerate these because they are initially somewhat stiff. You either love ‘em or hate ‘em.

Permalink Hot Deals No Comments »