A study of a number of Serbian Orthodox medieval churches, during their reconstruction or archeological investigation, revealed the presence of acoustical resonators. This paper offers a review of the resonators discovered to date. In addition, laboratory experiments were conducted on several resonators removed from churches in order to clarify their function. Based on the relevant literature, laboratory experiments, and analyses of acoustical characteristics of the worship spaces where resonators were found, it is concluded that the resonators found in medieval Serbian churches have not contributed to their acoustic quality. There are three reasons why the resonators were not effective. They were installed in very small churches where the additional absorption is not significant, their resonant frequencies were too low in relation to the frequency content of Serbian Orthodox worship service, and lastly, in some cases there were too few resonators to achieve audible changes in acoustic response of the church.
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References
1.
RayleighLord, “Theory of sound”, Macmillan, London (1896)
2.
ZwikkerC., and KostenC.W., “Sound absorbing materials”, Elsevier Publishing Company, Inc. (1949)
3.
BrüelP.V., “Sound insulation and room acoustics”, Chapman and Hall Ltd. (1951)
4.
KnudsenV., and HarrisC., “Acoustical designing in architecture”, Acoustical Society of America (1978)
CremerL.MulerH., and SchultzT., “Principles and applications of room acoustics”, Applied Science Publishers, London (1982)
7.
IngarU., “Notes on sound absorption technology”, Noise Control Foundation (1994)
8.
HoltsmarkJ., “The absorption and diffusion of sound by resonators”, I Kommisjon hos Jacob Dybwad, Oslo (1946)
9.
NielsenA.K., “Acoustic resonators of circular cross-section and with axial symmetry”, Trans. of the Danish Academy of Technical Sciences, No 10 (1949)
10.
AlsterA., “Improved calculation of resonant frequencies of Helmholtz resonators”, Journal of Sound and Vibration, Vol. 24, No 1 (1972) 63–85
11.
HirschwehrE., “Theoretical and experimental investigations of the mouth-correction for resonance absorbers”, Acustica, Vol. 30 (1974) 241–246
12.
PantonR., and MillerJ., “Resonant frequencies of cylindrical Helmholtz resonators”, JASA, Vol. 57, No 6 (1975) 1533–1535
13.
CummingsA., “Acoustics of a cider bottle”, Applied Acoustics, Vol. 5 (1972) 161–170
14.
CummingsA., “Acoustics of a wine bottle”, Journal of Sound and Vibration, Vol. 31 (1973) 331–343
15.
BiggG.R., “The three dimensional cavity resonator”, Journal of Sound and Vibration, Vol. 85 (1982) 85–103
16.
MohringJ., “Helmholtz resonators with large aperture”, Acustica – acta acustica, Vol. 85, (1999) 751–763
17.
DesarnauldsV., “De l'acoustique des églises en Suisse Une approche pluridisciplinaire”, PhD thesis, Ecole Polytehnique Fédérale de Laussane (2002)
18.
KayiliM., “Use of cavity resonators in Anatolia since Vitruvius”, 7th International Congres on Sound and Vibration, Garmisch-Partenkirchen (2000) 1621–8
19.
KalićD., “Acoustics of St Sava temple”, (in Serbian) Izgradnja, No 1 (1993) 23–29
20.
PretloveT., “Helmholtz resonators for the new Russian Orthodox church in London”, Acoustic Bulletin, London, January/February (1998)
21.
CarvalhoA.DesarnauldsV., and LoerincikY., “Acoustic behavior of ceramic pots used in middle age worship spaces – a laboratory analysis”, 9th International Congres on Sound and Vibration, Orlando (2002) 1621–8
22.
NenadovicS., “Resonators in Serbian medieval churches” (in Serbian), Zbornik Arhitektonskog fakulteta Univerziteta u Beogradu (1960) sveska V
23.
PavlovicD., “Wooden churches in Serbia” (in Serbian), Republički zavod za zaštitu spomenika kulture, Saopštenja – Knjiga V (1962)
24.
Bajalovic-Hadzi-PesicM., “Ceramics in medieval Serbia” (in Serbian), Museum of Belgrade City, (1981)
25.
MijicM., and BanjacV., “Function of acoustic resonators in Serbian churches illustrated by the Church of the Introduction of the Virgin in the Temple in Sremski Karlovci” (in Serbian), Grada za proučavanje spomenika kulture Vojvodine XX, Novi sad (1999) 87–104
26.
MijicM., and Sumarac-PavlovicD., “Acoustic resonators in serbian orthodox churches”, Forum Acusticum, Sevilla (2002) RBA-05-001-IP
27.
Sumarac-PavlovicD., and MijicM., “Preferred Reverberation Time of Serbian Orthodox Churches”, 17th ICA, Rome (2001) 3P21
28.
MijicM., “Serbian Orthodox Church – An Acoustical View”, 17th ICA, Rome (2001) 6C.09.04
29.
KalicD., “Acoustic resonators in Serbian medieval churches”, II Joint meeting of Greek and Yugoslav Acoustical Societies Proceedings (1984) 91–97
30.
ISO 3382:1995, “Measurement of the reverberation time of rooms with reference to other room acoustical parameters”
31.
FuruiS., “Digital speech processing, synthesis and recognition”, Marcel Dekker, Inc., New York (1989)
32.
EverestA., “Acoustical design of audio rooms” in “Handbook for sound engineers”, Focal Press, Boston (1995)
33.
NewellP., “Recording Studio Design”, Focal Press, Boston (2003)
34.
AndoY., “Concert Hall Acoustics”, Springer Verlag, Berlin (1985)
35.
AndoY., “Architectural acoustics: Blending sound sources, sound field and listeners”, AIP Press/Springer Verlag, New York (1998)
