Patent "Passive Cardioid Speaker, No. 10,123,111 B2," was granted to inventor David W. Gunness.

Rochester, NY (January 23, 2019)—Fulcrum Acoustic, LLC has been awarded a U.S. patent for a proprietary technology intended to overcome excessive rear low frequency radiation in loudspeakers.

The new patent, formally titled "Passive Cardioid Speaker, No. 10,123,111 B2," was granted to inventor David W. Gunness, Fulcrum Acoustic co-founder and vice president of R&D.

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The award document outlines how the patented loudspeaker's subcardioid behavior is produced by an acoustical circuit which balances the position of the low frequency driver, the enclosure depth and volume and an arrangement of acoustical elements, including rear-mounted ports and calibrated resistive elements.

Gunness noted the passive cardioid loudspeakers provide “directional control in less than half the space required for active cardioid arrays. This allows for cardioid performance in applications that might not otherwise have the budget or space to accommodate an active cardioid array."

Passive Cardioid Technology was first introduced in Fulcrum's FL283 Line Array Module, is the basis for their Cardioid Subwoofers product line and, most recently, was utilized in the FW15.

Fulcrum Acoustic • www.fulcrum-acoustic.com