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Snaga u funkciji ambijenta slušanja


Å¡ale

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30 miliona ljudi je tih dana kupilo Brothers in Arms i isto toliko CD-playera, Å¡to je direktno omogućilo viÅ¡edecenijsku vladavinu tog nesrećnog "nosaÄa zvuka". Brothers in Arms je ubio vinil. Da, rado ću spaliti svaki primerak na koji naiÄ‘em.

Nije tebi lako... isuse.gif

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Izradio sam tabelu-snaga u funkciji ambijenta slušanja za sobu 22 m2

osetljivost kutije u db (2,83v)-snaga pojaÄala u rmsw/snaga kutije u rmsw

85 db - 80 w/120W; 86 db-70W/100W; 87 db-50W/80W; 88 db-40W/70W; 89 db-32w/50W; 90 db-25W/40w

91 db-20W/40W; 92 db-16W/40W; 93 db-12W/40W

Napomena: merodavna minimalna snaga pojaÄala je minimalna snaga pojaÄala za datu kutiju.

Niža glasnoća je 93-94 +/- 5 db na mestu slušanja( to je koncertna glasnoća za kućne uslove i sve

žanrove muzike). maksimalni zvuÄni pritisak kod kutije je cca 106 db u piku.

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Snaga u funkciji ambijenta sluÅ¡anja- osetljivost kutije u db (2,83 v) snaga pojaÄala sinusna w/snaga kutije sinusna w

-za sobu 12 m2

85 db-40w/65w; 86 db-32w/50w; 87 db-25w/40w; 88 db-20w/40w; 89 db-16w/40w; 90 db-13w/40w; 91 db-10w/40w; 92 db-8w/40w; 93 db-6,3w/40w.

- za sobu 18 m2

85 db-65w/100w; 86 db-50w/80w; 87 db-40w/63w; 88 db-32w/50w; 89 db-25w/40w; 90 db-20w/40w; 91 db-16w/40w; 92 db-13w/40w; 93 db-10w/40w.

Savet: ako neko jako glasno sluša muziku (hevi metal) uzeće efikasniju kutiju, npr. 88 db osetljivosti kutije uzeće 90-91 db kutiju.

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efikasnost zvucnika i osetljivost istih nije isto.

Loudspeaker efficiency is defined as the sound power output divided by the electrical power input. Most loudspeakers are inefficient transducers; only about 1% of the electrical energy sent by an amplifier to a typical home loudspeaker is converted to acoustic energy. The remainder is converted to heat, mostly in the voice coil and magnet assembly. The main reason for this is the difficulty of achieving proper impedance matching between the acoustic impedance of the drive unit and the air it radiates into. (At low frequencies, improving this match is the main purpose of speaker enclosure designs). The efficiency of loudspeaker drivers varies with frequency as well. For instance, the output of a woofer driver decreases as the input frequency decreases because of the increasingly poor match between air and the driver.

ostetljivost:

Driver ratings based on the SPL for a given input are called sensitivity ratings and are notionally similar to efficiency. Sensitivity is usually defined as so many decibels at 1 W electrical input, measured at 1 meter (except for headphones), often at a single frequency. The voltage used is often 2.83 VRMS, which is 1 watt into an 8 Ω (nominal) speaker impedance (approximately true for many speaker systems). Measurements taken with this reference are quoted as dB with 2.83 V @ 1 m.

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The sound pressure output is measured at (or mathematically scaled to be equivalent to a measurement taken at) one meter from the loudspeaker and on-axis (directly in front of it), under the condition that the loudspeaker is radiating into an infinitely large space and mounted on an infinite baffle. Clearly then, sensitivity does not correlate precisely with efficiency, as it also depends on the directivity of the driver being tested and the acoustic environment in front of the actual loudspeaker. For example, a cheerleader's horn produces more sound output in the direction it is pointed by concentrating sound waves from the cheerleader in one direction, thus "focusing" them. The horn also improves impedance matching between the voice and the air, which produces more acoustic power for a given speaker power. In some cases, improved impedance matching (via careful enclosure design) lets the speaker produce more acoustic power.

preuzeto sa Vikipedije.

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Snaga u funkciji ambijenta sluÅ¡anja- osetljivost kutije u db (2,83 v) snaga pojaÄala sinusna w/snaga kutije sinusna w

-za sobu 12 m2

85 db-40w/65w; 86 db-32w/50w; 87 db-25w/40w; 88 db-20w/40w; 89 db-16w/40w; 90 db-13w/40w; 91 db-10w/40w; 92 db-8w/40w; 93 db-6,3w/40w.

- za sobu 18 m2

85 db-65w/100w; 86 db-50w/80w; 87 db-40w/63w; 88 db-32w/50w; 89 db-25w/40w; 90 db-20w/40w; 91 db-16w/40w; 92 db-13w/40w; 93 db-10w/40w.

Savet: ako neko jako glasno sluÅ¡a muziku (hevi metal) uzeće efikasniju kutiju, npr. umesto 88 db osetljivosti kutija i za nju date snage pojaÄala uzeti druge kutije osetljivosti cca 91 db (to je duplo glasnije kada se sluÅ¡a- 3 db).

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A gde je u toj formuli racunato koriscenje bass i treble potenciometra? Mozda neko koristi cak i balance :ph34r:

U pravu si, ovde je ubaÄena korekcija za tonske kontrole. Pažnja: vrednosti su taÄne za acid jazz i post-punk: za swamp rock (Kridensi, Dr. John i sliÄno) treba uneti koeficijent K=1.2:

Formula%202.jpg

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Rezerva je samo 2 db i to je uzeto za Phono sekciju . Ako odreÄ‘ujemo pojaÄalo bez Phono sekcije onda uzeti NPR. osetljivost kutija 88 db i sobu 12m2 pojaÄalo 13w ; za sobu 15m2 16w za sobu 18m2 20w: za sobu 22m2 25w ;za sobu 26m2 32w .To je minimalistiÄki dizajn.PojaÄalo nema rezervu odnosno korekciju napona ulaza na potencijometru.,

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Rezerva je samo 2 db i to je uzeto za Phono sekciju . Ako odreÄ‘ujemo pojaÄalo bez Phono sekcije onda uzeti NPR. osetljivost kutija 88 db i sobu 12m2 pojaÄalo 13w ; za sobu 15m2 16w za sobu 18m2 20w: za sobu 22m2 25w ;za sobu 26m2 32w .To je minimalistiÄki dizajn.PojaÄalo nema rezervu odnosno korekciju napona ulaza na potencijometru.,

Baš je udarila ova vrućina...

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