Acoustic device and flat speaker thereof

An acoustic device comprising:

• a casing including a window frame in which a display window is defined;
• a vibratory sound panel including a display region and an exciter mount region adjacent to said display region, said vibratory sound panel having a peripheral edge;
• a suspension disposed between said display frame and the peripheral edge of said vibratory sound panel to support said vibratory sound panel on said window frame of said casing;
• a display assembly mounted within said casing adjacent to said display region and including a display screen visible through said display region, said casing having a first space defined between said display screen and said vibratory sound panel and a second space surrounding said first space;
• an exciter mounted to said exciter mount region and located within said casing, said exciter being operated to cause said vibratory sound panel to vibrate in response to an electric signal;
• and
• a dust barrier for isolating said first space from said second space to prevent entry of dust from said second space into said first space, said dust barrier including a dust barrier member disposed between said display region and said exciter mount region and extending across said vibratory sound panel to inhibit dust particles from moving from said exciter mount region to said display region within said casing, said dust barrier member being yieldingly deformable in response to vibration of said vibratory sound panel.