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. 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. 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.