Megapone
Nws tau tsim xyoo 1915, thiab txij thaum ntawd los, ntau tiam neeg tau txais kev siv zog kom txhim kho nws. Txog rau hnub no, ntau lub tsev tsim hluav taws xob tau tsim tsa cov megaps me me, uas feem ntau yog siv rau kev qhia, kev ncig ua si, thiab kev ua si sab nraum zoov. Piv nrog siv cov microphones heophones, qhov txiaj ntsig loj tshaj plaws yog cov neeg siv dawb lawv txhais tes.
Loudspeaker
Kuj hu ua "hais lus". Nws yog ib feem heev siv electroacousic transducer ntaus ntawv, uas tuaj yeem pom hauv cov khoom hluav taws xob uas ua suab nrov. Tus neeg hais lus yog cov khoom uas tsis muaj zog tshaj ntawm cov hluav taws xob hluav taws xob, tab sis nws yog cov cuab yeej tseem ceeb tshaj plaws rau cov teebmeem suab.
Qhov tseeb, kom muab tso rau nws bluntly, ib megaphone yog lub microphone nrog suab. Lub suab nrov yog tus hais lus.
