Qhov txawv yog: lub microphone yog lub zog hloov hluav taws xob uas hloov cov suab paj nruag rau hauv hluav taws xob cov cim, uas yog siv los khaws lub suab ntawm koj cov lus. Tus hais lus yog ib yam ntawm cov transducer uas hloov hluav taws xob teeb liab mus rau hauv lub suab teeb liab, nws' yog lub teeb liab hluav taws xob uas hloov mus rau lwm sab los ua suab nrov.
Lub luag haujlwm ntawm lub microphone yog khaws lub suab, lub luag haujlwm ntawm tus hais lus yog ua suab.
Yog li thaum koj kaw tus neeg hais lus, koj tuaj yeem' tsis hnov lwm tus, thiab thaum koj kaw lub microphone, lwm tus neeg tuaj yeem' tsis hnov koj lub suab.