In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 47, No. 1A_Supplement ( 1970-01-01), p. 131-132
Abstract:
Some eigenmodes of both the top and back plates of the bodies of string instruments are known from measurements with capacitance transducers. But this method has been rather tiresome. It seems adequate, therefore, to apply holographic interferometry. Unfortunately, it was not possible to make use of real-time holographic interferometry because even the short time needed for the photographic developing process for the hologram is large enough that the wooden body changes its surface, maybe on account of small moisture changes. On the other hand, the time-average holograms give satisfying holographic pictures. Examples are given of those at low, middle, and high frequencies and also for excitation over the sound post and over the bassbar. The results are discussed in connection with measurements of the point impedances at both places of excitation.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1970
detail.hit.zdb_id:
1461063-2
