Lavalier microphones are small condenser micro phones or electret microphones for plugging in. They work wired or as a radio microphone with corresponding radio microphone systems, meet the highest demands and are ideal for speech use. Their frequency range corresponds to that of professional studio microphones and covers the range from 50 Hz to 18 kHz. The limiting sound pressure of the clip-on microphones is less than 130 dB with distortion factors of
1 % or better.GHz. An interesting alternative to lavalier microphones are headset microphones.