John Mulcahy
Professional room acoustic measurement suite. Used by paranormal investigators to establish acoustic baselines before investigations — characterising room resonances, standing waves, and noise floor so anomalies can be distinguished from environmental artifacts.
REW (Room EQ Wizard) is a free professional acoustic measurement application originally designed for home cinema and studio room correction. For paranormal investigators, its use is pre-investigation baseline establishment: before any active investigation, REW can characterise the acoustic properties of the location — identifying room resonances, flutter echoes, standing wave nodes, and the frequency-specific noise floor.
A location with strong room resonance at 120Hz will naturally amplify sounds at that frequency — an investigator hearing a 'low rumble' at that frequency is likely encountering a room resonance excited by distant traffic or building systems, not a paranormal source. REW's measurements make this distinction objective and documentable.
REW also measures the noise floor: the continuous background noise level at each frequency band. Any EVP claim can be tested against this measured noise floor — if the alleged EVP is below the measured ambient noise floor at that frequency, it is almost certainly noise rather than a discrete event. Pair with a calibrated measurement microphone (UMIK-1 or similar) for scientifically defensible measurements.
Investigator Note
REW measures acoustic properties as a scientific tool. Its output should be used to rule out environmental explanations for alleged audio anomalies before claiming paranormal origin. Baseline measurements should be taken during the same time period as the investigation.
Queen Mary University of London
Advanced spectrographic analysis tool from Queen Mary University. Designed for music research but adopted by EVP investigators for its annotation layers, pitch tracking, and publication-quality spectrogram output.
Wolfgang Buescher (DL4YHF)
Highly configurable real-time spectrum analyser used in amateur radio, acoustic research, and paranormal audio investigation. Displays live audio as a scrolling spectrogram — used by researchers monitoring for infrasound and sub-audio anomalies.
Cornell Lab of Ornithology
Scientific bioacoustics analysis suite from Cornell Lab. The tool of choice for academic-level EVP and acoustic anomaly analysis. Provides publication-quality spectrographic analysis with measurement statistics, selection tables, and peer-review-ready output.
