Method and apparatus for reducing undesired transmission of acoustic energy from a loudspeaker cabinet and for acoustically isolating high fidelity sets therefrom

摘要

Method and apparatus are disclosed for reducing undesired transmission of acoustic energy from a loudspeaker cabinet into the structure of a building in which the loudspeaker is located, and also for reducing the undesired acoustical feedback from the loudspeaker into the turntable assembly. A high-Q resonant external suspension apparatus is positioned beneath the cabinet of the turntable or the cabinet of the loudspeaker. This suspension apparatus includes compression springs having a predetermined taper and a very high-Q which are arranged to provide resonance in all three directions (X, Y and Z axes). The mass of the supported structure and the spring constant of the tapered springs are proportioned to provide a resonant frequency in the range from approximately 3 to 6.5 Hertz with approximately 4 Hertz being shown as the presently preferred value.