Influence of acoustic
effects on museum exhibits.
17 July 2008, the State Hermitage
The Palace square permanently becomes a place for some different
popular urban measures (various concerts, sportive programs, outdoor festivities etc.).
At their realization,
Sound impact is especially seriously reflected on painterly
In 2007 the State Hermitage, the academician Igor Grabar
Before the beginning of investigations, one has defined maximal vibration levels on painting surface in the Hermitage halls and also sound pressure levels in these premises on July 28, 2007 during performance of the "Rolling Stones" group. Measures have pointed that average sound level has made 88 dB.
At middle concert continuity making two hours and average quantity of concerts making ten in a year, estimated value of acoustic affecting exhibits will make 200 hours for ten years.
Further, tests have been fulfilled, in course of which sound
pressure levels have been measured in points located near surface
of patterns. After each affecting assigned sound pressure and sound
pressure with maximal levels in range of frequencies for 50 and 100 hours,
one has registered levels of shift due to vibration
on painting in point defined upon the "Electropribor"
method and octave sound pressure levels in range of frequencies
Results in macro- and microanalysis of paint canvas state
before and after acoustic affecting have pointed appearance destruction
focuses of primary structure in paint layer, weakening bonds
of author’s painting with priming and prime coat with canvas
fibers, certain increasing dimensions of minute cracks being earlier
in coat varnish and other
Thus, even at minimal estimations, performance of ten concerts a year additionally makes a picture one year older.
The State Hermitage continues to fulfill and to make more precise investigations of acoustic affecting exhibits and also begins the program of vibration study and estimation pertaining to museum exhibits and edifices.