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What does #sound look like? http://t.co/JRuARNBIS7 Related: "August Toepler - The first who visualized shock waves" http://t.co/cT1cqoEq2Z
What does #sound look like? http://t.co/JRuARNBIS7 Related: "August Toepler - The first who visualized shock waves" http://t.co/cT1cqoEq2Z