The present study was an attempt to empirically find out if the very
presence of background noise would impair L2 listening
comprehension, and also to explore to what extent the nature of noise
would mediate this disruption. Regarding the latter point, the effect of
lexicality, meaning, and Ll/L2 dichotomy were investigated. The
participants listened, within a repeated-measures design, to ten L2
passages two of which were against a quiet background and others
were in the presence of either radio static (roughly representing the
white noise, Le., the standard non-lexical noise), Russian (as a totally
unknown language) noise, English (L2) noise, or Persian (Ll) noise.
Matched t-test results showed the background noise to be substantially
disruptive of L2 listening comprehension. In addition, more masking
was found from white noise that from competing speech, including the
lexicality reduced the amount of masking. The effect of meaning, too,
did not reach significance: Meaningless background interfered with
L2 listening comprehension as much as did meaningful speech.
Similarly, Ll and L2~oises were statistically equal in their power to
corrupt L2 listening performance.