Open AccessThe Sound Representation of an Opera House’s Orchestra Pit: The Stereo Dipole Technique
Author(s) -
Vincenzo Vodola
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1351/1/012007
Subject(s) - loudspeaker , anechoic chamber , acoustics , ambisonics , binaural recording , opera house , directional sound , representation (politics) , computer science , sound (geography) , impulse response , room acoustics , impulse (physics) , computer graphics (images) , opera , art , physics , reverberation , visual arts , mathematics , mathematical analysis , quantum mechanics , politics , political science , law
By using 2 or 4 loudspeakers, the stereo dipole technique is able to realize the virtual sound field of an auditorium in an anechoic listening room. Making use of binaural impulse responses (BIRs) measured in the auditorium and the auralization technique, the virtual BIR can be generated. The accuracy of the sound representation is investigated by comparing the real and virtual BIRs. For a well-diffused sound field like concert halls, this technique enables a highly accurate representation of the sound field. Yet, when the sound source is in the small regularly shaped enclosures like an orchestra pit of an opera house, a peculiar amplification contained in the low-frequency range of the measured BIR is still more emphasized in the virtual BIR disturbing the linear sound representation. This study aims for the solution to this problem.