Professional ghost hunters generally use electronic devices, like amplified microphones and digital audio recorders in order to detect the paranormal. (dog-grooming-training.com)
To see whether this ability was tied to domestic life, the researchers sent the babies home with specialized gear: vests with audio recorders and adorable hats outfitted with small video cameras, one just above each ear. (sciencenews.org)
She puts up an array of 50 audio recorders in the woods and lets them record. (climateaudit.org)