Squawk (sound)

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High-amplitude, pulsed squawks made by a lemur

Squawks , or short wheezes , are brief, "squeaky" sounds; they are also referred to as squeaks. Their waveforms show a sinusoidal pattern with a duration 10 to 100 ms and a frequency between 200 and 800 Hz .

Many birds have made sounds which are onomatopoeically described as "squawk". Squawks have been described in bird fancier's disease and other forms of hypersensitivity pneumonitis . [1]

In humans, squawks are also heard in a variety of conditions in which alveolitis is present. In one study they were found in 10% of patients with pneumonia . [2]

References [ edit ]

  1. ^ Earis JE, Marsh K, Pearson, MG. The inspiratory “squawk” in extrinsic allergic alveolitis and other pulmonary fibroses. Thorax 1979;37:923?926.
  2. ^ Paciej R, Vyshedskiy A, Bana D, Murphy R, Squawks in pneumonia, Thorax 2004;59:177?179