I find I need this for hearing loss in one ear and tinnitus in that same ear. This device works as advertised, amplifying sounds. All sounds. So shirt noise, skin moving - all these factors become much more important. The diaphragm equivalent is curved, which i hate - it lets in background noise and tends to slip. The clarity of the traditional stethescope is (was, in my case) much better - so this product is not for ANYONE that can hear normally. It is only for us old guys that listened to music too loud. Having said all those negative things, I have used mine for a year, changed the battery only 3 times, and it has no signs of wear despite 40 plus hours a week on my neck. The button to turn it on could be bigger, and lose the curve, and have the thing remember the volume level you set it at last time and then this might be a product to be desired, not just settled for. Wow, I sound so negative. Oh well. Get more detail about Littmann 3000 Electronic Stethoscope with Ambient Noise Reduction.
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