echo (redirected from echoless)

echo (ek´o) a repeated sound, produced by reverberation of sound waves; also, the reflection of ultrasonic, radio, and radar waves.

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amphoric echo  a resonant repetition heard on auscultation of the chest, at an interval after a vocal sound.

metallic echo  a ringing repetition of heart sounds sometimes heard in patients with pneumopericardium or pneumothorax.

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echo

a reflected sound; the basis for echocardiography and ultrasonography.