We developed a vibration pick‐up‐type ear microphone which was formerly reported at the 90th ASA Meeting. After evaluating its function and comparing it with other conventional microphones, we concluded as follows; It is possible to obtain remarkable sensibility without closing the ear canal and to obtain high intelligibility voice in level over 95% of sound articulation. There was no significant difference between voice intelligibility with a mask and that without a mask. Sound articulation in high ambient noise of the vibration pick‐up type ear microphone (110 dB—96%, 125 dB—84%) is much higher than that of noise cancelling microphone (110 dB—87%, 125 dB—77%) and sound pressure type ear microphoen with ear muff (110 dB—85%, 125 dB—68%). By use of the earphone‐microphone, we can simultaneously talk and hear through the ear, thanks to no necessity of obstruction of the ear canal. Applications of the vibration pick‐up type ear microphone are (1) howlingless microphone, (2) free hand microphone, (3) mask microphone, and (4) microphone for voice communication in high ambient noise. We have made communication systems with the vibration pick‐up‐type ear microphone and evaluated in various environments.