Pūnaha Whakamātautau LPT-2 mō te Pānga Oro-Whiti

Whakaahuatanga Poto:

He whakatupuranga hou te whakamātautau pānga oro-whatu o ngā taputapu whakamātautau ā-tinana i roto i ngā Kāreti me ngā whare wānanga, e whakamahia ana hei ako i te tukanga ā-tinana o te taunekeneke o te mara hiko me te mara mārama i roto i ngā whakamātautau ahupūngao taketake me ngā whakamātautau ngaio e pā ana, ā, e pā ana hoki ki te rangahau whakamātautau o te whakawhitiwhiti whatu me te tukatuka mōhiohio whatu. Ka taea te whakaatu ā-kanohi mā te oscilloscope takirua mamati (Whiringa).

Ina haere ngā ngaru oro-oro i roto i tētahi reo, ka pāngia te reo e te taumahatanga pīngore me ngā huringa ā-wā i te wā me te wāhi, ka puta he huringa ā-wā rite tonu ki te taupū whakaata o te reo. Nō reira, ina haere tētahi hihi mārama i roto i tētahi reo i te aroaro o ngā ngaru oro-oro i roto i te reo, ka whakawehewehea e te reo e mahi ana hei whatu ā-wāhanga. Koinei te ariā taketake o te pānga acousto-whatu.

Ka whakarōpūtia te pānga acousto-whatu ki te pānga acousto-whatu noa me te pānga acousto-whatu rerekē. I roto i te reo isotropic, kāore te papa o te pōraritanga o te mārama taunga e whakarerekētia ana e te taunekeneke acousto-whatu (e kiia ana ko te pānga acousto-whatu noa); i roto i te reo anisotropic, ka whakarerekētia te papa o te pōraritanga o te mārama taunga e te taunekeneke acousto-whatu (e kiia ana ko te pānga acousto-whatu rerekē). Ko te pānga acousto-whatu rerekē te pūtake matua mō te hanga i ngā whakakāhore acousto-whatu matatau me ngā tātari acousto-whatu ka taea te whakarerekē. Kāore i rite ki te pānga acousto-whatu noa, kāore e taea te whakamārama i te pānga acousto-whatu rerekē mā te diffraction Raman-Nath. Heoi, mā te whakamahi i ngā ariā taunekeneke parametric pēnei i te taurite nekehanga me te kore taurite i roto i ngā whatu kore-raina, ka taea te whakatū i tētahi ariā kotahi mō te taunekeneke acousto-whatu hei whakamārama i ngā pānga acousto-whatu noa me ngā pānga acousto-whatu rerekē. Ko ngā whakamātautau o tēnei pūnaha e kapi ana i te pānga acousto-whatu noa i roto i ngā pāpāho isotropic.