Stewart Filmscreen has released a new acoustically transparent weave screen material, the Harmony G2. The weave is designed to minimize the need for equalization of speakers placed behind the screen, while still maintaining a high-end video experience. Visually, many acoustically transparent screens have what's referred to as a blue bump, where whites and grays have a blue tint causing things like grass and skin tones to look unnatural. The Harmony G2's color is consistent across the visible spectrum and doesn't have that blue bump thanks to a neutral-colored thread sourced by Stewart.
Because of the qualities of acoustically transparent weave screens, there's typically a loss in mid to high range frequencies and they require EQ correction. To determine how well the Harmony G2 performs against the competition, Stewart asked SH Acoustics—an independent acoustical consultancy firm that works on projects ranging from museums to whole-house acoustics—to conduct a variety of tests. In all the tests, the Harmony G2 consistently provided less signal loss between 5 kHz and 20 kHz by 1 to 2 dB. Acoustically transparent material not only passes sound but light as well, so most of the tests were conducted with a black liner that is necessary to preserve contrast and black levels.
The Harmony G2 is a flame-resistant, flexible front projection screen. It has a 0.7 peak gain which, through testing, Stewart determined is the highest achievable number. The screen material has a wide viewing angle and doesn't reach half gain until 85 degrees (it doesn't even reach 0.6 gain until 70 degrees).
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