seeking plans for a good passive acoustic amplifier for cell phones
Furnished content.
(from WoodNet.net)
Back when LOML and I were still using flip phones, I used to see lots of posts about wooden passive acoustic amplifiers that would cradle and amplify smart phones. Now, they seem hard to find and I am wondering about making some as presents.
Does anyone have a pointer to a plan that they made and that worked well for them?
thanks
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