CVR sounds
Firstly - if the assertion was the sound was replicated from the CVR mic recording it must be recognized that the mic is optimized for voice bandwidth. I commented on this previously, but don't have time to search for the post. But the CVR cockpit mic frequency range is limited - I want to say to around 6kHz....?
Secondly transient noises of short duration are very hard to isolate and make any sense of unless very loud. Ice shedding from the pitots would not do this.
Ice crystals hitting the windshield - yes, I can see that being audible, certainly.
Radome damage/departure/etc - something of this nature would certainly lead to a noticeable change in the aerodynamic impact noise footprint.
Both ice crystal noise and radome damage would be heard over the CVR. Ice-shedding not so, in my professional opinion.