Minecraft wiki entry for Development_versions, associated text: Added sound assets for existing events:
block.enchantment_table.use
entity.husk.ambient
entity.husk.death
entity.husk.hurt
entity.husk.step
entity.polar_bear.baby_ambient
entity.polar_bear.ambient
entity.polar_bear.death
entity.polar_bear.hurt
entity.polar_bear.step
entity.polar_bear.warning
entity.stray.ambient
entity.stray.death
entity.stray.hurt
entity.stray.step
Added new ambient sounds:
ambient/cave/cave15
ambient/cave/cave16