Hmmm. So uh. How much do one of these machines cost? And on a completely non related note. How far do screams travel before they disapate and cant be heard?
The distance which a sound can carry is greatly dependent on several factors which include location, terrain and weather.
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For example, on a cold and clear night in a semi rural area that is only modestly hilly, that sound will carry for miles.
In contrast, mid day hot summer in an alley in a major city, you'd be lucky to hear it around the corner.
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For example, on a cold and clear night in a semi rural area that is only modestly hilly, that sound will carry for miles.
In contrast, mid day hot summer in an alley in a major city, you'd be lucky to hear it around the corner.