Squawks, or short wheezes, are brief, "squeaky" sounds; they are also referred to as squeaks. Their waveforms show a

sinusoidal A sine wave, sinusoidal wave, or just sinusoid is a mathematical curve defined in terms of the '' sine'' trigonometric function, of which it is the graph. It is a type of continuous wave and also a smooth periodic function. It occurs often in ...

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 Pneumonia is an inflammatory condition of the lung primarily affecting the small air sacs known as alveoli. Symptoms typically include some combination of productive or dry cough, chest pain, fever, and difficulty breathing. The severi ...

.Paciej R, Vyshedskiy A, Bana D, Murphy R, Squawks in pneumonia, Thorax 2004;59:177–179

References

{{Respiratory system symptoms and signs Symptoms and signs: Respiratory system Bird sounds Onomatopoeia