You don't actually need to grunt to get a good tennis swing, so why not let you're tennis racket do all the grunting for you.
Read more on MAKE
The post This Tennis Racket Grunts Like Maria Sharapova When You Swing It appeared first on Make: DIY Projects, How-Tos, Electronics, Crafts and Ideas for Makers.
Published on December 21, 2015 05:30