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_20260817_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 2275.1 MLC32 1758.3 MLP44 841.0 MRC22 840.0	MRC54 76.9 MRO12 67.7 MRT41 63.9 MLO53 62.7
MEG_EmptyRoom_20260812_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 1341.6 MLC32 978.4 MRC22 500.8 MRF62 492.8	MRC54 69.0 MRO12 66.8 MRT41 65.3 MRT14 64.9
MEG_EmptyRoom_20260811_004 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 1139.4 MLC32 811.8 MLO24 674.4 MLO43 668.4	MRC54 67.9 MRO12 66.8 MRT41 64.6 MRT31 62.0
MEG_EmptyRoom_20260811_003 Length: 100.0 s Sample rate: 4800.0 Hz	MLO53 649.8 MLO52 612.2 MLO43 577.8 MLO33 561.6	MRC54 66.7 MRO12 65.8 MRT41 63.5 MRT31 62.2
MEG_EmptyRoom_20260811_002 Length: 100.0 s Sample rate: 4800.0 Hz
MEG_EmptyRoom_20260811_001 Length: 100.0 s Sample rate: 4800.0 Hz
MEG_EmptyRoom_20260730_001 Length: 100.0 s Sample rate: 4800.0 Hz	MLO53 802.7 MLO43 732.0 MLO52 718.1 MLO33 703.1	MRC54 73.9 MRF53 72.2 MRO12 68.2 MRT14 65.0
MEG_EmptyRoom_20260729_001 Length: 100.0 s Sample rate: 4800.0 Hz	MLT47 173.1 MLT57 170.3 MLO53 164.8 MLO34 161.3	MRC54 72.6 MRO12 67.9 MRT41 67.4 MRF11 65.7
MEG_EmptyRoom_20260610_001 Length: 100.0 s Sample rate: 4800.0 Hz	MZC02 385.0 MLC32 337.1 MLF53 331.3 MRC15 295.1	MRF11 85.6 MRT52 83.3 MRT55 80.6 MRT41 75.8
MEG_EmptyRoom_20260608_001 Length: 100.0 s Sample rate: 4800.0 Hz	MLC42 158747426.9 MRC15 853.8 MLC32 686.5 MLF43 348.0	MLC42 159360511.8 MRC54 71.5 MRT42 71.0 MRT41 65.8