No sound amplification?

I was wondering if anyone has tried one of these personal amplifiers, such as watching television. I know There Listen Up and Sonic Earz. Has anyone tried this? Do you work at all? Is it better than others?

They work, but amplify ALL. So if you're in a noisy and tried to hear a murmur in the room, you just hear everything in the room so hard that the bottom will always be covered by background noise. To avoid this problem, the games of professional football journalists and that use a highly directional microphone that is either a microphone or a dish that can concentrate shotgun microphone in just one part of a noisy area and to amplify the sound. The Sonic Earz and more are great in quiet areas like the forest at night. Its use in the forest at night can be pretty scary, believe me.

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