| 摘要 |
A flat panel sound radiator having improved audio performance is provided. The sound radiator has a panel to which is coupled a traditional electro-mechanical exciter for imparting audio frequency vibrational energy to the panel. The panel has a honeycomb core made of Kraft paper, which is flexible, has a low self noise, and high noise damping characteristics. The core is sandwiched between facing skins made of a material with a high Young's modulus, a high tan delta, a high tensile strength, and low self noise. Preferably, this material is an aramid polyamide such as Kevlar.RTM., Nomex.RTM., Conex.RTM., or Technora.RTM., all of which exhib it these properties. The facing skins are fixed to the core with an adhesive that is flexible and has high acoustic damping qualities and high shock resistance, such as rubber cements, silicone adhesives, and water-based acrylic adhesives. The result of the combination of these materials with their respective properties is a flat panel sound radiator that exhibits signal-to-noise greater than 40dB for an 85dB input signal within key audio frequency ranges, which is 20 dB or more greater than prior art flat panel sound radiators. Base response and sound level capacity are also dramatically enhanced.
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