Motorola EDGE 50

Dynamický rozsah hudby

GlossarySpeakersDynamický rozsah hudby

Dynamický rozsah v hudbe udáva podiel extrémnych hlasitostí v určitej hudobnej skladbe. Ide o pomer najhlasnejšieho zvuku k najslabšiemu. Ak napríklad počúvate hudbu, a v určitých fázach sa až zľaknete, ako intenzívne tóny zaznejú, potom má skladba pravdepodobne vysoký dynamický rozsah.

Napríklad, vážna hudba môže mať v extrémnych prípadoch dynamický rozsah až 18 dB. Ak v najslabších pasážach počúvate pri hlasitosti 87 dB a vaše reproduktory majú citlivosť 90 dB/W/m, potom budete na pokrytie 18 dB dynamického rozsahu potrebovať zosilňovač so špičkovým výkonom 32 W IHF. Vychádzame z faktu, že pre každé 3 dB nárastu hlasitosti je potrebný dvojnásobný výkon.

Hlasitosť (pri citlivosti repro 90 dB/W/m)	Výkon zosilňovača (príkon reprosústavy)	Dynamika
87 dB/m	0,5 W	0 dB
90 dB/m	1 W	3 dB
93 dB/m	2 W	6 dB
96 dB/m	4 W	9 dB
99 dB/m	8 W	12 dB
102 dB/m	16 W	15 dB
105 dB/m	32 W	18 dB
108 dB/m	64 W	21 dB

Výpočet je samozrejme len orientačný, pretože by ste museli byť v priamom poli reprosústavy vo vzdialenosti jedného metra a v nízkoodrazovom priestore. Ako však názorný príklad ukazuje, na bežné domáce počúvanie netreba extrémne výkonný zosilňovač. Vážna hudba je navyše pomerne hraničný prípad, v bežnej populárnej hudbe sa dynamika pohybuje v rozsahu 3 – 10 dB.

Hlasitosť (akustický tlak)	Subjektívne vnímanie	Zdroje zvuku
0 dB/m	Prah počuteľnosti	–
20 dB/m	Extrémne tiché	Šuchot lístia, tichá miestnosť
40 dB/m	Veľmi tiché	Vrčiaca chladnička
60 dB/m	Stredne hlasné	Bežná konverzácia, reštaurácia
80 dB/m	Veľmi hlasné	Mestská prevádzku, nákladné auto
100 dB/m	Extrémne hlasné	Symfonický orchester, traktor
120 dB/m	Prah bolesti	Štartujúce prúdové lietadlo

Naša ponuka zosilňovačov, receiverov a reprosústav

Slovník pojmov

Slovník pojmov – Výkon zosilňovača a receivera
Slovník pojmov – Citlivosť reprosústav SPL (dB/W/m)
Slovník pojmov – Akustický tlak (akustický výkon)
Slovník pojmov – Pásma reproduktora (reprosústavy)
Slovník pojmov – Maximálny dlhodobý príkon reproduktora (RMS)
Slovník pojmov – Impedancia reproduktorov (reprosústav)

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