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I’ve always used passive hearing protectors (like the Peltor 10A; see TM 11/2/07) when I’m in the shop (or mowing grass, or having a “discussion” with my wife), but have wondered if the electronic, or active, versions offer any major advantages. For example, the Pro Ears® Pro TEKT, pictured above, have DLSC™, or Dynamic Level Sound Compression technology, which compresses all sounds over a 70-dB threshold by 50% (to “a safe level”) while amplifying all sounds below the threshold. They claim the result is that the wearer hears everything, like normal conversation, but is protected from dangerous high-volume sounds.

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