This directory contains the noise portion of the corpus.
It contains 932 recordings with a total time of 6 hours and 7 minutes.
It captures a wide variety of technical and non-technical noises that 
cannot be considered speech or music. Some recordings feature an ambient
environment, e.g., walking through a city.  The ambient sounds usually do
not feature any intelligible speech.  Technical sounds include DTMF tones,
various cellphone noises (such as button presses or vibration),
dialtones and more. Non-technical sounds include thunder, lighting,
clapping, car horns, animal sounds, and more.