the front housing 11 is also a smooth surface accordingly when the fitting portion 52 of the sealing pedestal 5 is fitted to the fitted portion 13 the distal end surface 13 b of the fitted portion 13 and the top surface 51 a of the base 51 may be parallel to each other and both surfaces may be brought into contact with each other as a result the distal end surface 13 b of the fitted portion 13 in its entirety may uniformly come in contact with the top surface 51 a of the base 51 in the sealing pedestal 5 accordingly when the microphone 4 is completely assembled with the front housing 11 the airtightness of the microphone chamber 6 is ensured since the fitting portion 52 of the sealing pedestal 5 and the fitted portion 13 protruding from the inner surface 11 b of the front housing 11 are annularly formed the airtightness of the microphone chamber 6 may be easily ensured when the assembly of the microphone 4 is completed according to the present exemplary embodiment when the fitting portion 52 of the sealing pedestal 5 is fitted to the fitted portion 13 provided in the front housing 11 the distal end surface 13 b of the fitted portion 13 comes in close contact with the base 51 of the sealing pedestal 5 thereby ensuring the airtightness of the microphone chamber 6 that is even when the base 51 of the sealing pedestal 5 is.