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  Channel RMS   Top Channels   High-pass   Top Channels 
MEG_EmptyRoom_20260927_001
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MZC02 293.1 
 MLC32 241.0 
 MLC21 213.6 
 MRC15 205.7 

 MRC54 74.9 
 MLO43 67.1 
 MRO12 66.7 
 MRT41 63.1
MEG_EmptyRoom_20260923_002
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MRT45 429.9 
 MZC02 288.6 
 MLC32 218.0 
 MRC15 205.6 

 MRT45 374.5 
 MRC54 68.0 
 MRO12 65.3 
 MZC03 64.9
MEG_EmptyRoom_20260923_001
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MRC15 1990.5 
 MLC32 1394.4 
 MRC22 750.9 
 MRF62 728.5 

 MRT45 276.1 
 MRO11 79.8 
 MRC54 76.7 
 MRO12 66.4
MEG_EmptyRoom_20260922_002
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MZC02 270.8 
 MRC15 243.1 
 MLT47 220.7 
 MLC32 212.0 

 MRO12 67.2 
 MRC54 65.6 
 MRT41 64.5 
 MZC03 63.3
MEG_EmptyRoom_20260922_001
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MRF31 279.1 
 MLC32 268.7 
 MLO33 268.3 
 MRC15 260.8 

 MRC54 71.2 
 MRO12 64.3 
 MRT41 63.9 
 MLO43 63.8
MEG_EmptyRoom_20260922_001
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MRF31 279.1 
 MLC32 268.7 
 MLO33 268.3 
 MRC15 260.8 

 MRC54 71.2 
 MRO12 64.3 
 MRT41 63.9 
 MLO43 63.8
MEG_EmptyRoom_20260922_001
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MRF31 279.1 
 MLC32 268.7 
 MLO33 268.3 
 MRC15 260.8 

 MRC54 71.2 
 MRO12 64.3 
 MRT41 63.9 
 MLO43 63.8
MEG_EmptyRoom_20260921_001
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MRT45 826.6 
 MZC02 293.0 
 MRC15 255.6 
 MLC32 255.2 

 MRT45 147.9 
 MRF53 118.2 
 MRC54 73.0 
 MRO12 65.0
MEG_EmptyRoom_20260916_001
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MZC02 229.6 
 MLC32 206.6 
 MLC62 195.4 
 MRC15 183.2 

 MRC54 72.5 
 MRO12 66.6 
 MZC03 65.9 
 MRT41 63.1
MEG_EmptyRoom_20260915_001
Length: 100.0 s
Sample rate: 4800.0 Hz 
 MZC02 305.2 
 MLC32 241.0 
 MRF62 227.1 
 MRC15 212.4 

 MRC54 72.5 
 MRO12 67.4 
 MRO11 66.5 
 MRT41 62.9

Older datasets are stored below by year and month:

2026/09
2026/08
2026/07
2026/06
2026/05
2026/04
2026/03
2026/02
2026/01
2025/12
2025/11
2025/10
2025/09
2025/08
2025/07
2025/06
2025/05
2025/04
2025/03
2025/02
2025/01
2024/12
2024/11
2024/10
2024/09
2024/07
2024/06
2024/05
2024/04
2024/03
2024/02
2024/01
2023/12
2023/11
2023/10
2023/09
2023/08
2023/07
2023/06
2023/05
2023/04
2023/03
2023/02
2023/01
2022/12
2022/11
2022/10
2022/09
2022/08
2022/07
2022/05
2022/04
2022/03
2022/02
2022/01
2021/12
2021/11
2021/10
2021/09
2021/08
2021/07
2021/06
2021/05
2021/04
2021/03
2021/02
2020/12
2020/10
2020/03
2020/02
2020/01
2019/12
2019/11
2019/10
2019/09
2019/08
2019/07
2019/06
2019/05
2019/04
2019/03
2019/02
2019/01
2018/12
2018/11
2018/10
2018/09
2018/08
2018/07
2018/06
2018/05
2018/04
2018/03
2018/02
2018/01
2017/12
2017/11
2017/10
2017/09
2017/08
2017/07
2017/06
2017/05
2017/04
2017/03
2017/02
2017/01
2016/12
2016/09
2016/08
2016/07
2016/06
2016/05
2016/04
2016/03
2016/02