Acentech Inc. was invited to participate in the National Geographic Channel's "American Paranormal" show, a new series that brings various technical experts together to conduct scientific investigations into unexplained phenomena. Acentech's Dr. Steven Africk and Mr. Robert Berens appeared on the recent "Haunted Prison" episode that looked into the legendary haunting of Eastern State Penitentiary in Philadelphia. Their goal was to explore the possibility that the unique acoustical environment of this abandoned prison supports the presence of infrasound - very low-frequency acoustic energy below the frequency range of hearing of most humans, which has been associated with the strange sensations that people can experience in "haunted" locations.

Acentech's team spent two nights of filming at Eastern State Penitentiary, an abandoned and historic prison and one of the most popular tourist attractions in Philadelphia. Dr. Africk, a supervisory consultant in Acentech's Noise & Vibration Group, and Mr. Berens, a supervisory consultant in the firm's Architectural Acoustics Group, spent the first night monitoring a purportedly haunted cell block for infrasound, while, in parallel, other scientific professionals monitored the space for unusual infrared and electromagnetic signals, often claimed by ghost hunters to be caused by the ghosts themselves. For the second night, Acentech provided a custom-made "infrasound generator" for a demonstration of the effects of infrasound on a group of volunteers led through the prison. Both consultants appear on camera in the episode, which premiered on January 24, 2010.