Most people are looking beyond typical audio guides.
https://aam-us.org/docs/research/mobilemuseums2012-(aam).pdf
http://www.museumsandtheweb.com/mw2009/papers/smith/smith.html
http://blog.cuseum.com/post/145961727953/5-best-practices-for-creating-content-for-your
http://www.britishmuseum.org/about_us/news_and_press/press_releases/2015/new_audio_guide.aspx
A few thoughts. Are you familiar with AAM Center For The Future of Museums ?
http://www.aam-us.org/resources/center-for-the-future-of-museums
They have an excellent report, Trends Watch
https://aam-us.org/docs/default-source/center-for-the-future-of-museums/trendswatch-2017.pdf
Many museum people are referring to the Museum Digital Revolution (going beyond typical audio guides)
http://www.museumsandtheweb.com/mw2007/papers/incandela/incandela.html
Museums and the Web is an excellent resource
http://www.museumsandtheweb.com/best-of-the-web/
An excellent paper
http://openexhibits.org/paper/human-computer-interaction-in-informal-science-education-conference/
Are you familiar with GLAMs and the expected convergence?
http://researcharchive.vuw.ac.nz/handle/10063/2835
Also of interest online curation
Also of interest Gallery One:
Indianapolis-Marion County Public Library Central Library branch at Children’s Museum
http://www.indypl.org/locations/infozone/
Learning Curve at the Indianapolis Public Library