hum

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hum

 [hum]
a low, steady, prolonged sound.
venous hum a continuous blowing, singing, or humming murmur heard on auscultation over the right jugular vein in the sitting or erect position; it is an innocent sign that is obliterated on assumption of the recumbent position or on exerting pressure over the vein.

hum

(hŭm),
A low continuous murmur.
[echoic]

hum

(hum) a low, steady, prolonged sound.
venous hum  a continuous blowing, singing, or humming murmur heard on auscultation over the right jugular vein in the sitting or erect position; it is an innocent sign that is obliterated on assumption of the recumbent position or on exerting pressure over the vein.

hum

(hŭm)
A low continuous murmur.