No one acknowledged the sound

[Maybo]

“Naaaaaaaancy…” Heart in my throat, I looked around at everyone else. Do you not hear this? Do you not see this person? But no one was looking around. No one acknowledged the sound.

Source: At Home With the Horrors: 14 Tales by Sammy Scott

Does "acknowledged" mean "admitted that they hear the sound"?

 

[Skrej]

It's not that they didn't admit hearing it; nobody reacted as if they'd heard anything. Nobody was looking around for the source of the sound.