Tsheb acoustics loudspeaker hais txog qhov ua tau zoo uas peb mob siab txog nws ib txwm ua raws li hluav taws xob acoustics transducer, yuav qhia tau yooj yim dua nrog lub suab siab, tus yam ntxwv rhiab heev rau lub suab nrov, ntawm no qhia ob peb lub tswv yim hauv qab no.
(1) Tus yam ntxwv rhiab heev nyob rau hauv lub zaus zaus band. Nyob rau hauv qhov teev zaus band nyob rau hauv lub free teb tej yam kev mob, lub input lub hwj chim rau lub horn yog sib npaug rau 1W liab suab nrov teeb liab, thiab lub suab siab yog 1m deb ntawm qhov taw tes rau qhov siv axis. Qhov chaw dawb yog qhov chaw uas tsis muaj suab nrov. Nyob rau hauv qhov chaw, kev sib raug zoo ntawm lub suab siab P radiated los ntawm lub point suab qhov chaw thiab qhov kev ntsuam xyuas nyob deb R yuav tsum xws li hais tias P yog inversely proportional rau R, uas feem ntau yog ntsuas nyob rau hauv ib tug anechoic chamber.
(2) Cov yam ntxwv rhiab heev theem nyob rau hauv qhov teev zaus band. Ntawd yog, lub logarithmic yam ntxwv rhiab heev. Lub logarithm ntawm qhov piv ntawm cov yam ntxwv rhiab heev rau kev siv suab siab yog muab faib ua 20, qhia los ntawm dB. Kev siv suab siab yog 2 × 10-5Pa.
(3) Lub suab liab ntawm lub tsheb lub suab hais lus tau hais los ntawm no yog ib hom suab nrov teeb liab, uas yog hais txog lub suab nrov tas mus li thiab tsis sib xws nrog cov zaus band dav proportional rau qhov zaus. Uas yog hais, nws yog suab nrov nrog tib lub zog nyob rau hauv sib npaug zos proportions rau lub bandwidth tshaj ib tug dav band.
Reference axis yog hais nyob rau ntawm no, yog parallel mus rau lub horn ntawm lub ntsiab lus ntawm lub dav hlau hu ua qhov chaw siv, los ntawm lub horn axis thiab cov kab perpendicular mus rau lub reference nto yog hu ua tus siv axis, lub reference axis thiab cov ntaub ntawv nto kev sib tshuam taw tes yog hu ua lub ntsiab lus siv.
(4) Nws yog feem ntau ntsib thaum lub hwj chim horn input tsis yog 1W, tab sis lwm yam hwj chim qhov tseem ceeb, ces cov zis suab siab theem yuav raug xam raws li SPLMAX = Lp+10lgW0, qhov twg Lp - yam ntxwv rhiab heev theem; W0 -- Input zog ntawm qhov no.