All Ritual Purification Tracks + where they play.

Yoshiro's vocals could be 'keihitsu', signalling movement of the Goddess.(she's coming/descending) 

It's also vocalized during purification rites and when moving sacred objects. 

But it has many uses... 

Keihitsu meaning "to warn and clear the way." 

Articles: English | Japanese

A video on it: The priest's roar

Youtube AI summary:

Keihitsu (警蹕) is a solemn vocalization or ritual cry used in Shinto ceremonies to herald the movement of a deity (Kami), mark sacred transitions, or invoke a sense of awe and reverence.

Key Characteristics and Uses

• The Sound: It is typically a long, drawn-out vocal sound like "oooooo".

• Heralding Deities: Priests use it to announce when a deity is being summoned to or sent away from a temporary shrine or altar (himorogi).

• Ritual Moments: It is voiced during major ceremonies such as opening or closing inner shrine doors, purification rites (Oharahi), imperial processions, or when moving sacred objects (goshintai).

• Significance: It creates an atmospheric interval of solemnity, serving as a sign for participants to bow their heads and maintain sacred order.

Her vocals disappear(and become muffled) after she begins to petrify, with said petrification beginning at Kamukura Shrine where the Goddess is said to have once descended. 

 Do they disappear because there's no need to signal the Goddess is coming because she's here now?