RAW, yes. In practice, no.
When you cast a wizard spell with a spell slot, you can temporarily replace its damage type with a type that appears in another spell in your spellbook, which magically alters the spell's formula for this casting only. The latter spell must be of the same level as the spell slot you expend.
For the duration, no sound can be created within or pass through a 20-foot-radius sphere centered on a point you choose within range. Any creature or object entirely inside the sphere is immune to thunder damage, and creatures are deafened while entirely inside it. Casting a spell that includes a verbal component is impossible there.
In 5e there are no hidden rules. Spells don't have some category of damage type and need to be in that category to count for XYZ type of effect. Awakened Spellbook says you can replace the type of damage of a spell (generally abbreviated to damage type throughout the rules) and it does not say this is limited to when the spell deals damage to a creature. Ergo, by RAW, you can apply it to any spell that uses as part of its rules text a single type of damage (as there is no plural), and change it to any other type of damage that 'appears' in another spell in your spellbook.
This will never work at the table. It goes against the intuitive understanding people will generally form about this rule to the point that many people will strongly believe the text specifies damage dealt even if they have read it in recent memory. It will be 'read as', houseruled, or otherwise made to not be used in this manner, almost universally. Likely game designer tweets or errata or w/e will concur.
Weirdly, the author of this ability may have intended it to work with non damaging spells (such as spells that allow you to resist a form of energy). It bends over backwards to avoid saying 'deal damage' and is quite awkward about doing so - that typical wording is used in a lot of other places in the text and would naturally fit into the sentences of this ability.
Regardless, any use related to anything but switching damage types of damaging spells will likely be looked at very askance, and creative uses of silence's damage immunity etc will almost certainly be shut down via fiat.