acoustic shadow

(redirected from Sound shadow)
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acoustic shadow

[ə′küs·tik ′shad·ō]
(acoustics)
A region immediately behind an object placed in the path of a sound wave whose wavelength is much smaller than the object, in which the initial sound wave is cut off by the object and the sound intensity is determined by the diffraction and interference of sound waves bent around the obstacle.
References in periodicals archive ?
In the conventional group, the antral cross-section was monitored through ultrasonography to determine whether the tube entered the antrum based on the tube sound shadow. Subsequently, the tube was advanced to a depth of 105-110 cm.
A surface that obstructs a source of sound may mediate, reflect, and absorb the acoustic signal, resulting in an acoustic or sound shadow (Gordon & Rosenblum, 2004).
Synoground, for example, can tell when he's within 8 to 10 feet of a building because the structure alters sound, creating what Synoground refers to as a "sound shadow" around it.
But Prof Wright's system is the first to produce a personal 'sound shadow' that extends over a wide cone-shaped area in which everything but the unwanted noise can be heard - both indoors and outdoors.
Prof Wright's system, described in the magazine New Scientist today, is the first to produce a personal "sound shadow" that extends over a wide cone-shaped area in which everything but the unwanted noise can be heard.