Many claim there is a hearing/seeing theme in the book of Revelation, where John hears something, then sees something (or the other way around), and that both what he sees and hears have the same referent. The classic example is Revelation 5:5,6, where one of the elders tells John to look at a lion, and then sees a lamb. That both the lion and the lamb refer to Christ is sufficiently clear.
Many scholars use this hearing/seeing principle to identify referents throughout Revelation. For example, some scholars identify the 144,000 with the Great Multitude (Rev 7), because John hears the number 144,000, and then sees a great multitude. Some identify the new heavens and new earth with the New Jerusalem (Rev 21), appealing to the fact that one is seen and one is heard. (New Jerusalem is actually seen, but see Beale.)
However, it seems the only clear example ever appealed to for such a hearing/seeing principle is Rev 5:5,6. The identifications in Rev 7 and 21 are very disputable and rest on this hearing/seeing principle already existing. They cannot, in my view, be used to establish such a principle. At most, they demonstrate that John often sees something and then hears something, not necessarily that what he sees and hears are in fact the same thing.
Is it reasonable to establish a seeing/hearing principle merely on the basis of one clear example, namely Rev 5:5,6?
Are there other examples of hearing and seeing that clearly have the same referent and might lend credibility to such a hearing/seeing principle?