Multiband frequency targeting for noise attenuation

A fenestration unit with active sound canceling properties comprising:

• an insulated glazing unit mounted within a frame, the insulated glazing unit comprising:
• an exterior transparent pane;
• an interior transparent pane;
• an internal space disposed between the exterior and interior transparent panes;
• and
• a spacer unit disposed between the exterior and interior transparent panes;
• an active noise cancellation system comprising
• a sound cancellation device configured to be connected to at least one of the exterior and interior transparent pane, the sound cancellation device comprising
• a sensing element comprising at least one of a vibration sensor configured to detect vibration of the transparent pane and a sound input device configured to detect sound incident on the transparent pane;
• a vibration generator configured to vibrate the transparent pane;
• a sound cancellation control module in direct or indirect communication with the sensing element and the vibration generator;
• wherein the sound cancellation control module evaluates the detected vibration of the transparent pane at two or more discrete frequency bands;
• wherein the sound cancellation control module causes the vibration generator to vibrate the transparent pane causing destructive interference with sound waves at the two or more discrete frequency bands.

A window unit with active sound canceling properties comprising:

• a transparent pane;
• and
• an active noise cancellation system comprising
• a sound cancellation device configured to be connected to a transparent pane, the sound cancellation device comprising
• a sensing element comprising at least one of a vibration sensor configured to detect vibration of the transparent pane and a sound input device configured to detect sound incident on the transparent pane;
• a vibration generator configured to vibrate the transparent pane;
• a sound cancellation control module in direct or indirect communication with the sensing element and the vibration generator;
• wherein the sound cancellation control module evaluates the detected vibration of the transparent pane at two or more discrete frequency bands;
• wherein the sound cancellation control module causes the vibration generator to vibrate the transparent pane causing destructive interference with sound waves at the two or more discrete frequency bands.