Tlhaloso ea Sehlahisoa
Khetla le mochini o futhumatsang mocheso o na le likarolo tse joalo ka khetla, sephutheloana sa phetisetso ea mocheso, poleiti ea li-tube, poleiti ea baffle (baffle), le lebokose la tube. Hangata khetla e na le cylindrical, e na le bongata ba liphaephe tse kentsoeng ka hare, 'me lipheletsong tse peli tsa bongata li tsitsitse holim'a poleiti ea tube. Ho na le mefuta e 'meli ea metsi bakeng sa phapanyetsano ea mocheso: a batang le a chesang. E 'ngoe e phalla ka har'a tube 'me e bitsoa mokelikeli oa lehlakoreng la tube; Mofuta o mong oa phallo ka ntle ho phaephe o bitsoa mokelikeli oa lehlakoreng la khetla. Ho ntlafatsa mokelikeli o fetisang mocheso ka ntle ho phala, hangata li-baffles tse 'maloa li kenngoa ka har'a khetla. Li-baffles li ka eketsa lebelo la mokelikeli lehlakoreng la khetla, tsa qobella mokelikeli hore o fete ka har'a sephutheloana sa li-tube makhetlo a mangata ho latela tsela e boletsoeng, le ho matlafatsa tekanyo ea moferefere oa mokelikeli. Li-tubes tsa phapanyetsano ea mocheso li ka hlophisoa ka li-triangles tse lekanang kapa lisekoere holim'a poleiti ea tube. Tlhophiso ea kgutlotharo e equilateral e batla e kopane, e na le moferefere o phahameng ka har'a mokelikeli o ka ntle ho phala le mocheso o moholo oa ho fetisa mocheso; Tokisetso ea lisekoere e etsa hore ho hloekisoa ka ntle ho phala ho be bonolo 'me ho lokele maro a atisang ho eketseha.
