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_20261110_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 1761.4 MLC32 1268.9 MRF62 681.5 MRC22 675.2	MRF11 72.4 MRT31 69.0 MRO12 66.5 MRT41 65.0
MEG_EmptyRoom_20261107_001 Length: 100.0 s Sample rate: 4800.0 Hz	MZC02 144.5 MRC15 142.9 MLC32 131.0 MLF13 120.5	MRC54 74.6 MRT31 73.0 MRF11 72.1 MLF35 70.3
MEG_EmptyRoom_20261105_001 Length: 100.0 s Sample rate: 4800.0 Hz	MLF13 761.9 MRT56 746.0 MRF14 475.5 MLC63 270.9	MRO11 76.9 MRF11 66.7 MRT41 65.8 MRO12 65.3
MEG_EmptyRoom_20261104_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 2303.9 MLC32 1610.8 MLF51 902.9 MRC22 863.3	MRO12 66.4 MRF11 66.2 MRT41 65.2 MRC54 64.4
MEG_EmptyRoom_20261102_001 Length: 100.0 s Sample rate: 4800.0 Hz	MLF13 321.9 MLC32 309.1 MLO52 207.8 MLF64 197.6	MRC54 71.8 MRT31 69.6 MRF11 68.9 MRO12 66.2
MEG_EmptyRoom_20261028_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 2249.6 MLC32 1629.6 MLF13 855.1 MRC22 842.2	MRF11 69.3 MRO11 68.4 MRT31 68.2 MRC54 67.1
MEG_EmptyRoom_20261027_002 Length: 100.0 s Sample rate: 4800.0 Hz	MLC32 321.2 MRC15 249.0 MZC02 187.4 MLC21 141.5	MRF11 71.6 MRC54 69.8 MRT31 68.9 MRT41 68.2
MEG_EmptyRoom_20261027_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRT56 834.9 MLF13 271.2 MRC15 224.3 MLC32 221.6	MRF11 74.3 MRT31 71.2 MRO12 70.2 MLO43 69.0
MEG_EmptyRoom_20261021_002 Length: 100.0 s Sample rate: 4800.0 Hz	MLF23 435.0 MRT56 334.5 MZC02 289.1 MRC15 267.0	MRO12 71.1 MLO43 68.7 MLO53 68.4 MRT31 66.9
MEG_EmptyRoom_20261021_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 1752.4 MLC32 1244.0 MRF62 694.0 MRC22 666.6	MLO53 74.8 MLO43 72.5 MRO12 71.3 MLO52 70.8