Cilmi baaris ay sameeyeen Dr. Christopher Clark oo ka tirsan Jaamacadda Cornell ayaa lagu sameeyay xogta ciidanka, waxay muujisay in codadka nibiriga ay ku safraan kumanaan kiiloomitir. Marka laga soo tago bixinta macluumaadka ku saabsan wax soo saarka heesaha, xogta waxay u oggolaaneysaa cilmi-baarayaashu inay raacaan wadada socdaalka ee nibiriga inta lagu jiro "heesaha" (la kulmida) xilli ciyaareedka. Natiijo muhiim ah ayaa ah in nibiriyada, habka loo yaqaan Lombard effect, ay hagaajinayaan heesahooda si ay u magdhabaan wasakheynta dhawaaqa. Intaa waxaa dheer, waxaa jira caddeyn ah in nibiriyada buluugga ah ay joojinayaan soo saarista codadka D-frequency sonar mar la hawlgeliyo, inkasta oo inta badan (1<unk>8Hz) ay ka badan tahay soddon jeer inta ay u safraan badweynta. Cilmi-baaris kasta oo la sameeyay iyadoo la adeegsanayo xogta militariga waxay muujisay in codadka nibiriga uu ku safra kum
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