reverberation

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act of reverberating.
• noun The condition of being reverberated.
• noun Something reverberated.
• noun An echolike force or effect; a repercussion.

from The Century Dictionary.

• noun In psychology, same as resonance, 5 .
• noun The act of reverberating, or of driving or turning back; particularly. the reflection of sound, light, or heat: now chiefly of sound.
• noun Resonance; sympathetic vibration.
• noun That which is reverberated; reverberated light, heat, or sound: now chiefly sound.
• noun The circulation of flame in a specially formed furnace, or its deflection toward the hearth of the furnace, as in the reverberatory furnace (which see, under furnace).

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of reverberating; especially, the act of reflecting light or heat, or reëchoing sound

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A violent oscillation or vibration
• noun An echo, or a series of overlapping echos
• noun The reflection of light or heat; a reflection in, or as though in, a mirror.
• noun plural An evolving series of effects resulting from a particular event; a repercussion

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a remote or indirect consequence of some action
• noun the repetition of a sound resulting from reflection of the sound waves