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Double basses on the stage floor: Tuning fork–table top effect or not?
KTH, Skolan för datavetenskap och kommunikation (CSC), Tal, musik och hörsel, TMH, Musikakustik.ORCID-id: 0000-0002-0144-7205
2012 (Engelska)Ingår i: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 131, nr 1, s. 795-806Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The question whether or not double basses can benefit from a compliant and radiating stage floor in the low end of their tonal register, similar to the well-known tuning fork–tabletop effect, was examined through field experiments in five concert halls. The topic comprises several aspects: (1) How well the mechanical impedances of double basses and the stage floor match, (2) amount of vibration velocity transmitted to the floor through the end pin of the bass, and (3) radiation efficiency of point-excited bending waves in the stage floor far below the coincidence frequency. Each aspect represents a prerequisite for the tuning fork–tabletop effect to take place. The input impedance at the end pin was measured for three representative double basses. The stage floors of five orchestra halls were measured with respect input impedance and damping, while sound radiation to the audience area was measured for two of them. In Lindeman Hall, Oslo, all conditions for the tuning fork–tabletop effect to take place were clearly met. The contribution from the stage-floor radiation to the sound pressure level in the audience area was found to be about 5 dB between 40 and 60 Hz, and even higher between 30 and 40 Hz.

Ort, förlag, år, upplaga, sidor
2012. Vol. 131, nr 1, s. 795-806
Nationell ämneskategori
Datavetenskap (datalogi) Språkteknologi (språkvetenskaplig databehandling)
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URN: urn:nbn:se:kth:diva-52257DOI: 10.1121/1.3651791ISI: 000299131200015Scopus ID: 2-s2.0-84855933005OAI: oai:DiVA.org:kth-52257DiVA, id: diva2:465553
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tmh_import_11_12_14. QC 20120124Tillgänglig från: 2011-12-14 Skapad: 2011-12-14 Senast uppdaterad: 2018-01-12Bibliografiskt granskad

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