站点链接:https://bouncyballs.org/
站点标题:BouncyBalls–Manageclassroomnoisewithbouncingballs!
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Afreeclassroomnoiselevelmeter,monitorandmanagementtool.Perfectifyourschoolkidsaretoonoisy!Bouncingballsreacttosoundsfromthemicrophone.