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Table 5 Frequency domain features for patients with dysphagia performing viscous 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) 10.53 ± 22.95 10.02 ± 12.65 64.03 ± 217.5 21.07 ± 54.81 19.55 ± 48.17 59.36 ± 199.0
Center frequency (Hz) 93.42 ± 301.3 32.27 ± 23.70 850.4 ± 1289 132.5 ± 315.1 34.34 ± 67.53 788.5 ± 1242
Bandwidth (Hz) 202.7 ± 557.1 63.60 ± 68.09 615.3 ± 762.6 283.6 ± 518.1 82.99 ± 116.7 666.4 ± 824.2
Wavelet entropy 0.625 ± 0.637 0.946 ± 0.693 0.908 ± 0.786 0.568 ± 0.610 0.719 ± 0.545 0.801 ± 0.794