ACOUSTICAL NOISE CONTROL PRODUCTS

Brand Owner Address Description
TECHNICON TECHNICON INDUSTRIES, INC. 4412 Republic Ct. NW Concord NC 28027 acoustical noise control products, namely absorbers, dampers and barriers for use in construction;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. A system for reducing noise in an acoustical signal comprises a sampler (104) for obtaining discrete samples of the acoustical signal, an analog to digital converter (106), and a noise suppression circuit (108). The noise suppression circuit (108) selects a fixed number of samples. These samples are multiplied by a windowing function and the fast Fourier transform is computed to yield transformed windowed signals. A smoothed power estimate and a noise estimate are calculated. The noise estimate and the smoothed power estimate is used to calculate a gain function. A transformed speech signal is obtained by multiplying the gain function with the transformed windowed signal. Then, the inversed fast Fourier transform of the transformed speech signal is added to a portion of the speech signal of a previous frame.