Sound Protection Standards for Secret Spaces May be Insufficient

What's the best place to conduct a conversation about a confidential or even classified matter? Surprisingly, probably not a conference room designed in accordance with acoustical criteria approved by the Department of Defense. While such "secret" rooms might meet DOD standards, they offer less protection against snooping than is found in a luxury condo. So says Marlund Hale of Advanced Engineering Acoustics in Simi Valley, California, who evaluated the acoustic performance of several classified spaces.

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