Ammonium dihydrogen phosphate (ADP), a superior alternative, was found as a replacement for Rochelle salt; the first application was a replacement of the 24 kHz Rochelle-salt transducers.
Rochelle tuzunun yerine alternatif olarak, üstün bir alternatif olan amonyum dihidrojen fosfat (ADP) bulundu; İlk uygulama, 24 kHz Rochelle tuz transdüserlerinin yerine geçti.