Table 2: Recognition rate for the proposed perceptual generalized spectral subtraction method based on the gammatone and the gammachirp filter banks decomposition (GSS_GT and GSS_GC) compared with the spectral subtraction rule (GSS).

Babble noise
Methods/SNR051015

GSS16.88%31.25%44.19%64.96%
GSS_GT
 MCRA30.02%39.76%51.56%80.98%
 MCRA228.12%36.88%47.69%64.25%
 IMCRA30.68%45.77%63.21%84.24%
 MS26.63%33.86%50.03%79.58%
GSS_GC
 MCRA33.80%41.62%56.23%89.01%
 MCRA229.99%37.80%48.89%71.53%
 IMCRA33.89%56.07%68.21%91.22%
 MS27.38%35.96%55.83%83.98%

Car noise
Methods/SNR051015

GSS47.88%61.25%65.19%73.56%
GSS_GT
 MCRA67.90%82.83%77.63%88.98%
 MCRA258.61%77.76%67.42%74.09%
 IMCRA70.68%86.40%87.87%90.09%
 MS57.08%70.85%75.29%88.08%
GSS_GC
 MCRA69.09%87.99%79.80%89.97%
 MCRA268.78%85.60%79.04%80.43%
 IMCRA71.08%88.86%89.89%91.95%
 MS59.18%72.15%78.90%89.01%