Squawk (sound)

High-amplitude, pulsed squawks made by alemur

Squawks,or shortwheezes,are brief, "squeaky" sounds; they are also referred to as squeaks. Their waveforms show asinusoidalpattern with a duration 10 to 100msand a frequency between 200 and 800Hz.

Many birds have made sounds which areonomatopoeicallydescribed as "squawk". Squawks have been described inbird fancier's diseaseand other forms ofhypersensitivity pneumonitis.^[1]

In humans, squawks are also heard in a variety of conditions in whichalveolitisis present. In one study they were found in 10% of patients withpneumonia.^[2]

References[edit]

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

[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

[1]

[2]