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Table 3 Frequency domain features for patients with dysphagia performing thin swallows

From: Dysphagia and its effects on swallowing sounds and vibrations in adults

  Non-stroke Stroke
A–P S–I Sounds A–P S–I Sounds
Peak frequency (Hz) 11.68 ± 27.98 11.74 ± 14.58 304.0 ± 491.0 34.54 ± 97.57 14.94 ± 54.28 257.0 ± 433.4
Center frequency (Hz) 73.15 ± 113.9 54.60 ± 84.64 801.9 ± 682.6 199.3 ± 291.0 90.75 ± 184.6 895.9 ± 899.3
Bandwidth (Hz) 134.75 ± 211.4 92.45 ± 106.8 552.1 ± 562.0 344.2 ± 498.2 136.4 ± 265.6 697.3 ± 704.4
Wavelet entropy 0.905 ± 0.703 1.063 ± 0.707 1.185 ± 0.725 1.204 ± 0.870 1.171 ± 0.772 1.027 ± 0.776