BS 6840-4:1997

Recommends the characteristics to be specified and the methods of measurement for sound system microphones.Cross References: IEC 60065:1985*IEC 60268-1:1985*IEC 60268-2:1987*IEC 60268-3:1988*IEC 60268-5:1989*IEC 60268-11:1987*IEC 60268-12:1987*IEC 60268-15:1987*IEC 60574-3:1983*IEC 60581-5:1981*IEC 60651:1979*IEC 60801-2:1991*IEC 60914:1988*IEC 61000-4-3:1995*IEC 61094-2:1992*IEC 61265:1995*CISPR 20:1990*ISO 354:1985*ITU-T Recommendation P.51 (1996)*IEC 60574-1:1977*IEC 60574-2:1992*IEC 60581-1:1977