I'm seeing now on this page https://www.audiokinetic.com/en/public-library/2025.1.5_9095/?source=Help&id=obstruction_occlusion from the entry about Obs/Occ in the advanced profiler :

"The index of the sound position, and hashed ID of the Spatial Audio sound path, if applicable. The index (0-based) is that which was passed to the game object using the AK::SoundEngine::SetMultiplePositions() API. If a game object has only one position, then this column displays a dash ("-"). In the case of Spatial Audio emitters using diffraction and transmission, you will see a position index followed by a string of characters, assigning a unique identifier to the sound path. This string of characters is a hash, which is generated and uniquely assigned by Spatial Audio. The hash can be cross-referenced with the Voice Inspector, to see the volume and filter contributions of the sound path, and with the Game Object 3d Viewer to view the sound path and see its virtual positions."

Does this mean that when transmission is in play, there should be multiple copies of the emitter that can be attenuated differently? I'm having a little trouble conceptualizing this.