Sound comes from ____. They create sound waves which move through air or water before reaching our ears. Dogs can hear sound at a ____ frequency than humans. That is why dogs can hear noises that we can't. For dry air at a temperature of 0 °C (32 °F), the value for the ____ of sound is 331.29 metres per second. In liquid water at 8 °C it is about 1,439 metres per second. The scientific study of sound waves is also known as ____. It is a branch of physics. A pleasing or meaningful arrangement of sounds is also known as ____.

Five Sound Facts

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