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CHIL Scripted Meetings


Scripted meetings (SM) are short real meetings with the duration of less than 10 minutes. Their aim is to collect an amount of various acoustic events in a compressed slot of time. In these meetings the vocal part has been put in background and the major attention given to the typical noisy events.
Just like real meetings, SM are composed by many temporal parts, from the entrance in the room till the final applause.
This kind of meetings is easier to annotate and is less annoying for people being recorded.

Description of the acoustic events

The acoustic events reproduced during the scripted meetings were of the same kind of the events present in the ITC-irst AED database. That database will be used for training and this SM database is ideal for testing the implemented classificator. Noises like paper wrapping and keyboard clicking were repeated more than once during a meeting and by more than one person.

Description of the recording audio setup

The scripted meetings were held in our CHIL-room and recorded with 36 microphones plus one NIST MarkIII array modified by ITC-irst. There were 4 close-talk Countryman microphones, 28 were mounted in 7 T-shaped arrays and then there were 4 table microphones. The CHIL-room picture with microphones setup can be seen below.
Data were recorded at 44.1kHz and 24-bit precision. All the channels except the MarkIII were synchronized through a clock on BNC connector. Signal format is RAW Little Endian, while for the MarkIII data format is SMD.

Description of the recording procedure

Recordings were composed by two parts. In the first part each participant had to introduce himself in front of a camera, being recorded by one far and one  close-talk microphone. This short recording was done to allow to put in relation the voice with the face.
The second part consisted in the real meeting. Four people partecipated at each SM. One of them was designed as presenter, using a laptop and a projector, two of them were regular listeners and the last one was the latecomer.
A script procedure was given to participants, containing some instructions and noises to produce during the meeting. Freedom was given, so people were free to produce as many noisy events as they liked. This resulted sometimes in a overproduction of events.
In total we recorded 7 scripted meetings, 10 women and 14 men partecipated in the experiments.

Description of the database

Data recorded consist in 7 experiments. Every experiment is composed by two separate parts. In the first part (personal presentation), 2 signals were recorded. They are called intro_closetalk.raw and intro_far.raw. For the second phase we recorded the 36 microphone signals + 1 MarkIII signal.