The installation uses modern technology to demonstrate sounds captured by the technology of 100 years ago, as visitors use their smartphones with a specially created app. I'll be honest and say the app isn't perfect. I wasn't able to download it on my rather old phone and had to share my husband's iPhone, but it was worth it. I found the event fascinating. It might not have summoned up any spirits, but it definitely evoked the atmosphere of psychical research in the 1920s.https://www.eventbrite.com/e/sound-installation-the-laboratory-of-psychical-research-tickets-169467976279? You can turn up to see if there have been any last-minute cancellations, but you might have to hang around and wait.
The venue is the Court Room, Senate House, Malet Street, London, WC1E 7HU and the installation is open from 10am to 5pm. It's not far from Treadwell's esoteric bookshop in Store Street and very close to the British Museum.