Creating the amplifier consists largely of cutting a hole near the bottom big enough to place your smartphone in and stuffing the end with tissue paper (to help muffle the “tinny” echo sound). As Mashable demonstrates, you can go a bit farther by propping it up with binder clips and painting it. For a quick one-time use, it might not be necessary, but for a makeshift sound amplifier your guests can use, it’s super handy.
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