A-Line Acoustics News

The Sound of Silence (Aug. 2007, Sound & Communications)

Sound masking has evolved from the simple systems used for open
offices during the 1970s to today's more sophisticated approaches,
with advanced functions used to provide confidentiality in closed
offices, medical and financial facilities, as well as for protection
against eavesdropping in government, military or corporate

Early sound masking systems consisted of small boxes powered by a
lowvoltage source. As commercial use expanded, centralized systems
evolved, giving rise to more control opportunities. As manufacturers
learned more about listener responses to masking, these
opportunities developed into expanded functions for the equipment.
Some functions improve listener acceptance, while others improve
system performance.