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Intermediate mass black holes (IMBHs) with a mass between $10^{2}$ and$10^{5}$ times that of the sun, which bridges the {mass gap between the}stellar-mass black holes and the supermassive black holes, are crucial inunderstanding the evolution of the black holes. Although they are widelybelieved to exist, decisive evidence has long been absent. Motivated by thesuccessful detection of massive stellar-mass black holes by advanced LIGO,through the gravitational wave radiation during the binary merger, in this workwe investigate the prospect of detecting/identifying the lightest IMBHs(LIMBHs; the black holes $\gtrsim 100M_\odot$) with the second generationgravitational wave detectors. In general, the chance of hearing the birth ofthe LIMBHs is significantly higher than that to identify pre-merger IMBHs. Theother formation channel of LIMBHs, where stars with huge mass/low-metallicitydirectly collapse, is likely "silent", so the merger-driven birth of the LIMBHsmay be the only "observable" scenario in the near future. Moreover, theprospect of establishing the presence of (lightest) intermediate mass blackholes in the O3 run and beyond of advanced LIGO is found quite promising,implying that such an instrument could make another breakthrough on astronomyin the near future. The joining of other detectors like advanced Virgo wouldonly increase the detection rate.

Hearing the birth of the lightest intermediate mass black holes with the second generation gravitational wave detectors