Salzburg acoustics and vibration consultancy holding ÜBZERT Z-ENS-2022-016 for elektroakustische Notfallsysteme produkt- und systemunabhängig, for Planung and Projektierung only. It is the sole product-independent ENS certificate in Austria — every other holder is certified on named manufacturers’ platforms — which makes it the one firm that can specify a voice-alarm system without being tied to a supplier. ⚠ its site returns HTTP 403 to automated requests; the certificate is verified from the register.