Squawk (sound)
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Squawks or short wheezes are brief "squeaky" sounds that 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. Squawks have been described in bird fancier's disease and other forms of hypersensitivity pneumonitis [1]. They 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].
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