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Superconducting voice coil - a route to increase efficiency of an electrodynamic loudspeaker


Đurek, Ivan; Đurek, Danijel; Somek, Branko
Superconducting voice coil - a route to increase efficiency of an electrodynamic loudspeaker // proc od 2nd Congres of AAAA and 1st Croatian Acoustic Associaation
Opatija, 2005. str. 143-147 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Superconducting voice coil - a route to increase efficiency of an electrodynamic loudspeaker

Autori
Đurek, Ivan ; Đurek, Danijel ; Somek, Branko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proc od 2nd Congres of AAAA and 1st Croatian Acoustic Associaation / - Opatija, 2005, 143-147

Skup
2nd Congres of AAAA and 1st Congres of Croatian Acoustic Association

Mjesto i datum
Opatija, Hrvatska, 23-24.06.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Loudspeaker; superconductors; efficiency

Sažetak
Loudspeaker is the most critical part of an electroacoustical chain, and construction and design are going in the direction of lowering distortion and increasing efficiency. Efficiency of a common loudspeaker is very low, below 1%. One way to increase efficiency of an electrodynamic loudspeaker is to use superconductors as the material for the voice coil. Standard characteristics of the electrodynamic loudspeaker, like vibration amplitude, output power and efficiency have been analyzed, when copper wire in the voice coil is considered to be replaced by superconducting single turn ribbon. It is evident an apparent increase of the efficiency in a broad frequency range. Basic conclusions have been experimentally tested on the copper voice coil with reduced electric resistance after cooling down to 130 K.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika



POVEZANOST RADA


Projekt / tema
0036011

Ustanove
Fakultet elektrotehnike i računarstva, Zagreb