NIMH MEG Core Facility Empty Room Recordings

Empty Room Recordings

We periodically make recordings with nobody in the MSR, as a way to monitor background noise levels. The datasets are made available here. The Download link points to a compressed tarball of the dataset. The topo plots show the RMS values for the entire run, using a 150 Hz bandwidth (click to enlarge). Notch filters at 60 Hz and 120 Hz are also applied. One channel, MRC15, is often noisier than the others, so the second topo plot shows the RMS values after applying a 2 Hz high-pass filter. A list of the top RMS values (fT) along with the corresponding channel names is also shown.

The Python script that generates the topo plots is here: RMStopo.py. You will also need pyctf, located here: Dataset and Task Utilities.

Download link	Top Channels	Top Channels
MEG_EmptyRoom_20261019_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRT56 765.2 MRC15 330.9 MLC32 327.8 MLO53 210.8	MRC54 72.9 MRO12 64.8 MRP54 63.0 MRT31 62.6
MEG_EmptyRoom_20261018_001 Length: 100.0 s Sample rate: 4800.0 Hz	MLF13 865.0 MRT56 435.4 MRF14 385.5 MRF44 325.3	MRC54 71.4 MRT31 62.0 MRT41 61.6 MRF11 61.1
MEG_EmptyRoom_20261017_002 Length: 100.0 s Sample rate: 4800.0 Hz	MRP54 328.9 MLC17 324.0 MLP54 288.8 MLP35 274.9	MRP54 234.2 MLP54 207.5 MLC17 192.7 MRP53 184.8
MEG_EmptyRoom_20261017_001 Length: 100.0 s Sample rate: 1200.0 Hz	MZC02 294.4 MRP54 225.3 MLC21 213.7 MRF62 210.9	MRP54 179.7 MLP54 143.9 MLC17 126.3 MRP53 123.5
MEG_EmptyRoom_20261015_005 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 2029.1 MLC32 1529.2 MRC22 749.1 MRF62 705.3	MLO43 69.8 MRO12 69.0 MLO53 66.9 MRF11 66.9
MEG_EmptyRoom_20261015_004 Length: 100.0 s Sample rate: 4800.0 Hz	MLP35 420.9 MLP45 413.5 MLC32 391.7 MLC17 337.6	MRO12 69.0 MRF11 67.8 MLO53 66.0 MRC54 65.6
MEG_EmptyRoom_20261015_003 Length: 100.0 s Sample rate: 4800.0 Hz	MZC02 355.8 MLC32 279.0 MRF62 259.2 MLC21 246.1	MRO12 68.7 MRF11 67.8 MRC54 66.8 MLO53 66.0
MEG_EmptyRoom_20261015_002 Length: 100.0 s Sample rate: 4800.0 Hz	MLC32 702.3 MRC15 663.0 MZC02 343.5 MRF62 312.0	MRC54 75.4 MRO12 68.0 MRF11 67.2 MRT41 66.3
MEG_EmptyRoom_20261015_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 1222.4 MLC32 1195.9 MLC23 500.3 MRC22 496.8	MLO43 79.5 MRF11 67.5 MRT41 66.3 MLO53 66.1
MEG_EmptyRoom_20261014_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 1786.5 MLC32 1268.5 MRC22 702.1 MRF62 673.2	MRO11 76.1 MRO12 67.7 MRC54 66.5 MRT41 63.1