I made my whisper phones with 3/4 inch PVC elbow joints, 3/4 inch PVC pipe, and decorative duct tape. You can purchase a bag with 10 elbow pieces in it from Home Depot. Home Depot will also cut the PVC pipe into pieces for you. I was able to get about 25 pieces cut from one pipe. I used Abby to test out how long I needed the pipe to be cut. Between 4 and 4 1/2 inches is about right.
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