Beside his scientific publications Speter was an active science popularizer and communicator. As a member of the Deutsches Museum's founding team,  he arranged the chemical, physical, and mineralogical exhibits. After leaving this position, he remained an advisor to the museum, consulting about new exhibits. Later on, he used to publish popular humorous and illustrated versions of his works in newspapers and popular science magazines. Between 1924 and 1926 he gave a series of radio lectures.