System/Library/PrivateFrameworks/Announce.framework
ANVolumeUtils.h
@interface ANVolumeUtils : NSObject
+ (float)dBFromVolume:(float)a0;
+ (float)volumeFromDB:(float)a0;
@end
System/Library/PrivateFrameworks/Announce.framework
@interface ANVolumeUtils : NSObject
+ (float)dBFromVolume:(float)a0;
+ (float)volumeFromDB:(float)a0;
@end