- This specification covers microphones designed for use in intercommunication and announcing systems aboard Naval ships. The microphones are noise canceling types suitable for use in noisy areas.

- Microphones shall be of the following types, as specified (see 6.2):

           Type
    M124/SIC   -  Hand held, equipped with 18 inch length of MCOS-5 cable and six pin connector (rep lace-
                   ment for type IC/MPM-3).
    M125/SIC   -  Hand held, equipped with 120 inch coil cord and six pin connector (replacement for types
                   IC/MPM-6 and M-114/U).
    M132/SIC   -  Hand held, equipped with 120 inch coil cord and six pin connector (replacement for type
                   IC/MPM-4).
    M131/WIC   -  Hand held, equipped with 120 inch coil cord and ten pin connector (replacement for type
                   M-106/U).