Q. My daughter is autistic and has been recently diagnosed with Tourette's Syndrome. The main thing that seems to trigger many of her attacks is sound. The bell at school, babies crying, loud cars or motorcycles, sudden noises, the train whistle.
I am looking to purchase the best the best sound reduction headphones for her. She currently has a pair of shooting muffs she wears she also uses the 3M banded headphones, but still those are not quite strong enough.
I was looking at your website and saw the Musician ear plugs. I do not fully understand the differences in the NRR 12 and the NRR 16. I am looking for the type that will block or reduce the most sound possible. Is this something that you can help me with?
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A. Thank you for reaching out to us. We empathize with your challenges.
The noise reduction rating (NRR) is a single number that helps users compare the relative effectiveness of different hearing protection devices. The highest rating is 33 NRR, and that is available only in an in-the-canal type of ear plug. For ear muffs, the maximum is around NRR 29.
To contrast different devices, here is a good rule of thumb: each 10 dB (NRR is measured in dB) results in the perceived sound level being cut in half, so a 20 NRR device will let half as much noise in as will a 30 NRR rated device.
I am going to guess that your daughter is using a muff with an NRR of around 26 or so? If that is the case, and she is still bothered by the amount of noise reaching her ears, you might want to consider a couple of other options as follows:
Dual Protection: Ear Plugs + Ear Muffs
Dual protection, which means wearing an ear plug under her muffs is the simplest and the most effective means for eliminating noise without resorting to electronics. The product I would suggest is the Crescendo Music plugs. These come in two sizes, included in the package, so she will almost certainly get a good fit, they are comfortable enough to wear all day, and their noise blocking performance (NRR 12) is such that she will be able to hear voices well, and even listen to music with them in, but at a reduced volume. These will reduce the volume by around 60-70%, so for most situations, they will be adequate to be worn alone. Then, when things get annoying, she can simply put on her muffs and get an additional reduction in noise of around 60% more, letting her hear just a whisper of the sounds going on around her.
Noise Masking
Noise masking will enable her to block out nearly everything, and is the most effective approach to blocking noise that is available today. From what you have written, I cannot tell if this is a system you should consider, but I mention it only as a means to help you understand your options, and it could be worthwhile for the future if not now. Here is more information on how noise masking works.
Note: We sell the personal isolation system with a small white noise machine, but you can achieve similar results by using a white noise app on a smart phone, to make it portable for your daughter.
Until next time, be safe and do the right thing.
Tom Bergman, Vice President
Ear Plug Superstore