LOUD: Large acOUstic Data Array Data Page
Back to Main Page
Please note: these recordings are from a preliminary set of
calibration experiments with the LOUD array. A much more complete data
set will be available in the near future.
For this experiment, a 1"-diameter loudspeaker (the source) is
producing a "click" (unit impulse approximation) followed by a series of
frequency-sweep "chirp" sounds. You may download the sound here (thanks to Kevin Wilson; view the spectrogram). A microphone at the
source position (attached to the loudspeaker) is recording the audio, as
are all 1020 microphones in the array.
Microphone positions are available here.
The files are formatted in Matlab-readable format, with lines of 1024
columns, where the columns are separated by spaces. There are 1020
microphones in the array. The other four microphones present in the
files are the reference microphone at the source position; an
unconnected microphone; and two counters given as a sanity check (see
the top of the positions file for
more details). Some of the recordings contain three seconds of audio,
some only have two seconds. The chirp only turns on part-way through
the recording, so that the initial click is always present. The last
recording contains a recording of 10 seconds of speech.
The (0,0,0) position is at the bottom row of the array, in the middle
of the row. Please note that the source positions relative to the array
are given in inches, while the microphone positions are in meters.
|File (Uncompressed)||Size||File (TAR,Gzip'd)||Size||Duration||Approximate Source Position (in inches)|
| ||R12-speech-10sec.tar.gz||634MB||10 sec|