Make a Comment • Email Link • Send Letter to Editor • View for Print IPFS Make a Comment • Email Link • Send Letter to Editor • View for Print Scientists create sound that can curve through a crowd and reach just one person Written by Donna Hancock Date: 08-29-2025 Subject: Science, Medicine and Technology Your browser doesn't support video. Please download the file: video/mp4 Watch Streaming Broadcast Live: LRN.fm Watch live shows and archives TV Live Chat Telegram Share this page with your friends on your favorite social network: