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_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
MEG_EmptyRoom_20260519_001 Length: 100.0 s Sample rate: 4800.0 Hz	MLF56 3377.2 MRF63 2954.8 MRC32 2657.6 MLF13 221.6	MLF56 3279.1 MRC32 2536.5 MRF63 2480.5 MRC54 82.0
MEG_EmptyRoom_20260507_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 570.9 MLC32 355.6 MZC02 261.6 MLP33 241.0	MRC54 66.1 MRT41 61.6 MRO11 61.2 MRP21 61.1
MEG_EmptyRoom_20260505_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 248.6 MZC02 163.2 MLC32 160.6 MLP33 145.8	MRC54 71.5 MRT41 61.1 MRP21 60.5 MRT31 60.4
MEG_EmptyRoom_20260429_001 Length: 100.0 s Sample rate: 4800.0 Hz	MZC02 161.9 MRC15 152.4 MLO41 143.6 MLO31 141.1	MRC54 72.9 MRT41 61.3 MRP21 60.8 MRT31 60.6
MEG_EmptyRoom_20260428_001 Length: 100.0 s Sample rate: 4800.0 Hz	MLO53 310.7 MLO33 288.5 MLO52 288.0 MLO43 275.0	MRC54 75.7 MRT41 63.3 MRP44 62.0 MRP21 61.1
MEG_EmptyRoom_20260422_001 Length: 100.0 s Sample rate: 4800.0 Hz	MRC15 670.9 MLC32 404.9 MLP33 266.6 MRF62 237.6	MLO53 66.9 MRC54 64.4 MLO43 63.8 MRT41 63.4
MEG_EmptyRoom_20260421_001 Length: 100.0 s Sample rate: 4800.0 Hz	MLC32 449.2 MLF64 332.1 MRC23 202.3 MLC23 197.9	MRC54 72.3 MRF24 64.4 MRP21 61.2 MRT41 60.6