Discover a creative way to amplify your smartphone's sound with this easy DIY project. Learn how to repurpose a stethoscope and plastic bottles to build a homemade phone speaker amplifier. Follow step ...

I have bunch of MP3s that can use some sound amplification, because after I burn then to a CD, I have to put the volume control all the way up in my car's CD-player and on PC too while playing as MP3 ...

Personal sound amplification devices, or PSAPs, amplify sound waves for those who have normal hearing, or hearing thresholds of 20 dB or better in both ears. Unlike hearing aids, hearing amplifiers ...