Magnetic Anomaly Detection System
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MADS has appeared in various peer-reviewed scientific journals. Some of these are available to download on this site. They are, in publication order:
Braithwaite, J. J. (2004). Magnetic variances associated with 'haunt-type' experiences: A comparison using time-synchronised baseline measurements. European Journal of Parapsychology, 19, 3-29. Download here.
This is the first paper to report findings using the MADS in the field at a reputedly haunted location. This was also the first scientific paper ever to report dual-running simultaneous time-linked measurements from a baseline and reputedly haunted area. Here long measuring durations were used (4-hours). As our initial magnetic research was only interested in amplitude variation measures, the sample rate was set at 33 samples a second for these preliminary investigations.
Braithwaite, J. J., Perez-Aquino, K., & Townsend, M. (2005). In search of magnetic anomalies associated with haunt-type experiences: Pulses and patterns in dual time-synchronized measurements. Journal of Parapsychology, 68(2), 255-288.
This paper is a follow up in an attempt to replicate the original findings and investigate further the nature of the magnetic anomalies that were measured. The measuring time was increased to 6 hours (again time-linked). Also, in this study both sensors were zeroed into the background field and the unit of interest was how the magnetic field varied on top of the large permanent distortion we found in the first study. An odd pulse-burst pattern was measured on this return visit that was absent from the initial study.
Braithwaite, J. J., & Townsend, M. (2005). Sleeping with the entity: A magnetic investigation of an English castle's reputedly haunted bedroom. European Journal of Parapsychology*, 20.1, 65-78. Download here.
For this study the sensors were speeded up to their maximum of 250 samples per second. This study was the first ever to provide a detailed amplitude and frequency analysis from time-linked synchronised sensors. This study also provided more information concerning a strange magnetic anomaly around a bed in a reputedly haunted bedroom.
Braithwaite, J. J. (2006). Using digital magnetometry to quantify anomalous magnetic fields associated with spontaneous strange experiences: The magnetic anomaly detection system (MADS). Journal of Parapsychology, 69(1), 151-171.
This paper gives the full technical overview of the MADS system from sensors to analysis software configurations. This paper is a must-read for anyone wanting to build their own configuration based on this technology.
Braithwaite, J.J. (2008) Putting Magnetism in its Place: A Critical Examination of the Weak-Intensity Magnetic field Account for Anomalous Haunt-type Experiences. Journal of the Society for Psychical Research.
* Thanks to EJP for permission to reproduce their papers.
The papers here are in Adobe Acrobat PDF format. To read them you will need the Acrobat reader which is available free from the Adobe website.