The volume on full tanning tubs is VERY loud (and also on windmills). My guildmates want me to place my tubs and windmill FAR away from them. Perhaps lower the volume on these items?
Tanning tubs could use a volume reduction of 50% at least, and perhaps a reduction on audible range of 50% also.
Windmills... reduce volume by 20%, and range by 50%. They are currently realistically noisy, but very annoying...