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ZVUK
Kolegij: Multimedijski sustavi
Nositelj kolegija: Nataša Hoić-Božić
Autor:Tina Knez
Uvodno u zvuku
• Zvuk je multimedijski element
• Fizička pojava, potrebno ga je pretvoriti iz analognog u
digitalni oblik za korištenje na računalu
• 1969. proizvodnja sintetskog zvuka pomoću računala u
Bell Labsu
Podjela zvukovnih datoteka
• Datoteke u valnom obliku tj. digitalizirane audio datoteke
• Pohranjuju informacije o zvučnim valovima, brojeve o jačini
analognog signala
• Putem zvučne kartice zvučni valovi u analognom obliku pretvaraju
se u digitalni
• MIDI datoteke – sintetizirani zvuk
• Razvijen za muzičke instrumente i računala
• Isključivo pohranjuju glazbu u digitaliziranom zapisu koji se može
izravno reproducirati
• Manja veličina, neovisna o kvaliteti izvedbe
Korištenje zvuka pri multimediji
• Zvuk je neopravdano zapostavljen u hipermedijskim i
multimedijskim prezentacijama
• Prednosti korištenja zvuka:
• Naglašavanjem elemenata zvukom povećava se interes i utjecaj kod
korisnika, lakše će zapamtiti elemente povezane s odgovarajućim zvukom
• Upotpunjuje i uljepšava vizualne medije
• Uključuje se kao:
• Pripovijedanje
• Muzika i zvuk u pozadini
• Zvučni efekti
Kako čujemo zvuk?
• Zvuk je val titranja čestica zraka koji se širi zrakom
određenom brzinom i intenzitetom te podražuje slušni
sustav
Doživljaj zvuka
• Zvuk je određen frekvencijom, valnom duljinom i
amplitudom
• Frekvencija je broj titraja koje materijal čini u jednoj sekundi
(oznaka f, mjerna jedinica Hz)
• “Frekvencijska selektivnost” – ljudsko uho osjetljivije u nižim i
srednjim frekvencijama, ne čuje sve frekvencije jednako
• Šum je zvuk koji nastaje nepravilnim titranjem zvučnog izvora,
frekvencija se mijenja
• Ton nastaje pravilnim titranjem zvučnog izvora, frekvencija je
stalna
Doživljaj zvuka (2)
• Visina zvuka
• Glasnoća zvuka ovisi o amplitudi zvučnog vala, mjeri se u
decibelima (db)

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Zvuk

  • 1. ZVUK Kolegij: Multimedijski sustavi Nositelj kolegija: Nataša Hoić-Božić Autor:Tina Knez
  • 2. Uvodno u zvuku • Zvuk je multimedijski element • Fizička pojava, potrebno ga je pretvoriti iz analognog u digitalni oblik za korištenje na računalu • 1969. proizvodnja sintetskog zvuka pomoću računala u Bell Labsu
  • 3. Podjela zvukovnih datoteka • Datoteke u valnom obliku tj. digitalizirane audio datoteke • Pohranjuju informacije o zvučnim valovima, brojeve o jačini analognog signala • Putem zvučne kartice zvučni valovi u analognom obliku pretvaraju se u digitalni • MIDI datoteke – sintetizirani zvuk • Razvijen za muzičke instrumente i računala • Isključivo pohranjuju glazbu u digitaliziranom zapisu koji se može izravno reproducirati • Manja veličina, neovisna o kvaliteti izvedbe
  • 4. Korištenje zvuka pri multimediji • Zvuk je neopravdano zapostavljen u hipermedijskim i multimedijskim prezentacijama • Prednosti korištenja zvuka: • Naglašavanjem elemenata zvukom povećava se interes i utjecaj kod korisnika, lakše će zapamtiti elemente povezane s odgovarajućim zvukom • Upotpunjuje i uljepšava vizualne medije • Uključuje se kao: • Pripovijedanje • Muzika i zvuk u pozadini • Zvučni efekti
  • 5. Kako čujemo zvuk? • Zvuk je val titranja čestica zraka koji se širi zrakom određenom brzinom i intenzitetom te podražuje slušni sustav
  • 6. Doživljaj zvuka • Zvuk je određen frekvencijom, valnom duljinom i amplitudom • Frekvencija je broj titraja koje materijal čini u jednoj sekundi (oznaka f, mjerna jedinica Hz) • “Frekvencijska selektivnost” – ljudsko uho osjetljivije u nižim i srednjim frekvencijama, ne čuje sve frekvencije jednako • Šum je zvuk koji nastaje nepravilnim titranjem zvučnog izvora, frekvencija se mijenja • Ton nastaje pravilnim titranjem zvučnog izvora, frekvencija je stalna
  • 7. Doživljaj zvuka (2) • Visina zvuka • Glasnoća zvuka ovisi o amplitudi zvučnog vala, mjeri se u decibelima (db)