▁literary ▁scholar , ▁transl ator ▁and ▁politician ▁of ▁Democratic ▁Party ▁( b . ▁ 1 9 5 1 ) ▁▁ 2 6 ▁April ▁– ▁Pav ol ▁Sed lá č ek , ▁medical ▁doctor , ▁politician ▁of ▁former ▁People ' s ▁Party ▁– ▁Mov ement ▁for ▁a ▁Democratic ▁Slov ak ia ▁and ▁Chair man ▁of ▁T ren č ín ▁Self - g over ning ▁Region ▁in ▁ 2 0 0 6 – 2 0 1 3 ▁( b . ▁ 1 9 4 9 ) ▁▁▁ ▁Category : 2 0 1 0 s ▁in ▁Slov ak ia ▁Slov ak ia ▁Slov ak ia ▁Category : Year s ▁of ▁the ▁ 2 1 st ▁century ▁in ▁Slov ak ia <0x0A> </s> ▁In ▁ac oust ics ▁and ▁audio , ▁a ▁trans ient ▁is ▁a ▁high ▁amplitude , ▁short - duration ▁sound ▁at ▁the ▁beginning ▁of ▁a ▁wave form ▁that ▁occurs ▁in ▁phen omena ▁such ▁as ▁musical ▁sounds , ▁no ises ▁or ▁speech . ▁ ▁Trans ients ▁do ▁not ▁necessarily ▁directly ▁depend ▁on ▁the ▁frequency ▁of ▁the ▁tone ▁they ▁initi ate . ▁It ▁contains ▁a ▁high ▁degree ▁of ▁non - period ic ▁components ▁and ▁a ▁higher ▁magnitude ▁of ▁high ▁frequencies ▁than ▁the ▁harm onic ▁content ▁of ▁that ▁sound . ▁ ▁Trans ients ▁are ▁more ▁difficult ▁to ▁encode ▁with ▁many ▁audio ▁compression ▁algorithms , ▁causing ▁pre - echo . ▁ ▁Son ar ▁ ▁The ▁term ▁trans ient ▁is ▁used ▁by ▁military ▁son ar ▁operators ▁to ▁describe ▁unexpected ▁sounds ▁em an ating ▁from ▁another ▁vessel ▁such ▁as ▁operating ▁mach