Cylindrical microphone having an electret assembly in the end cover

A microphone for converting sound into an electrical signal, comprising:

• a housing having an end cover with a sound port, said end cover being a separate component from said housing, said housing having an internal ridge near said end cover;
• a diaphragm directly attached to said end cover, said diaphragm for undergoing movement in response to said sound from said sound port;
• a backplate positioned against said internal ridge and positioned to oppose said diaphragm;
• and
• a spacer adjacent to said backplate, said diaphragm engaging said spacer when said end cover with said attached diaphragm is installed in said housing.

A method of assembling a microphone, comprising:

• positioning a backplate into a housing of said microphone such that said backplate rests against an internal ridge in said housing;
• positioning a spacer member in said housing adjacent to said backplate;
• and
• installing an end cover assembly with an attached diaphragm onto said housing, said installing including sandwiching said spacer member between said backplate and said diaphragm.

A microphone for converting sound into an electrical signal, comprising:

• a cylindrical housing having an internal diameter;
• an end cover with a sound port, said end cover having a circular periphery and a lower surface at said circular periphery, said circular periphery having a diameter that is dimensioned so as to fit said end cover within said housing;
• a diaphragm directly attached to said lower surface of said end cover, said diaphragm for undergoing movement in response to said sound for said sound port;
• and
• a backplate adjacent to said diaphragm within said housing.