Multicondition Sennheiser Microphone Only Training Set
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Half(3569) of WSJ0(7138) utterances from multicondition data, recorded
with the Sennheiser microphone.

No noise added to one fourth(893) of this subset. Artificial
noise is added to rest of the data. The noise type is randomly chosen
out of 6 noises (Car, Babble, Restaurant, Street, Airport and Train
Stations) and at randomly chosen SNR between 10 and 20 dB in steps of
1 dB.

Acoustic Models: cross-word with 4 mixtures per state

Training Time: 23 Hours on an 800 MHz processor