noise recordings to be in a language understood well by those researching it, rather than in an unfamiliar language, has been cited as evidence of this, and a broad class of phenomena referred to by author Joe Banks as Rorschach Audio has been described as a global explanation for all manifestations of EVP. In a 2019 investigation of a supposed haunted painting in a West Virginia museum, paranormal researcher Kenny Biddle investigated the claims made by the museum owner and ghost hunters that an EVP recording clearly saying the woman's name, "Annie", is really the voice of the woman in the portrait. The name Annie is written on the back of the portrait, which primes anyone listening for the name, to know what name to listen for. The EVP was created using a Radio Shack radio "modified to allow it to continually scan through the available AM or FM frequencies without muting the sound." Regarding a general question by the ghost hunter "What is your name?", Biddle writes, "I can guarantee sooner or later you'll hear something that sounds like a name, and there is a good chance of being a name, because you're listening to radio broadcasts, news reports, commercials, and so on—which often include names." Biddle lists words such as "company, anything, anyone, mahogany, many, or even any." as words that can be commonly heard while listening to the radio. The phrase '"...and he..."' would also sound like "Annie" to anyone primed to listen for the name Annie. Skeptics such as David Federlein, Chris French, Terence Hines and Michael Shermer say that EVP are usually recorded by raising the "noise floor" – the electrical noise created by all electrical devices – in order to create white noise. When this noise is filtered, it can be made to produce noises which sound like speech. Federlein says that this is no different from using a wah pedal on a guitar, which is a focused sweep filter which moves around the spectrum and creates open vowel sounds. This, according to Federlein, sounds exactly like some EVP. This, in combination with such things as cross modulation of radio stations or faulty ground loops can cause the impression of paranormal voices. The human brain evolved to recognize patterns, and if a person listens to enough noise the brain will detect words, even when there is no intelligent source for them. Expectation also plays