Science of winter: Why your voice carries farther on a cold morning
Ottawa Citizen

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By Tom Spears, Ottawa Citizen, January 31, 2017

This winter, Postmedia’s Tom Spears looks at what makes our coldest season tick. It’s a series we call The Science of Winter, and today we ask why sound itself behaves differently on a very cold day

.“Never tell a secret on a cold day,” says David Phillips, who is Environment Canada’s senior climatologist and the country’s resident expert in all things weather.

Cold air slows down the speed of sound compared to warm air. But it also makes sound travel farther.