A polytrihedral dome for acoustic retroreflection, and its application to creative-arts practice-led research
Published in Applied Acoustics, 2022
This paper examines acoustic retroreflection from a polytrihedral dome that was used in creative-arts practice-led research as a unique, high voice support singing practice space. The polytrihedral dome is investigated with laboratory measurements, field recordings of singing practice, and by finite-difference time-domain (FDTD) simulation of sound reflections within the polytrihedral dome and other kinds of domes for comparison. Measurements and FDTD simulations show that the polytrihedral dome is retroreflective, especially in the 2 kHz octave band and higher, and provides high levels of voice support. Oral-binaural measurements of voice support exhibit a 4 dB/octave spectral slope from the 500 Hz to the 4 kHz octave bands. The power spectrum of singing is measured and used to weight voice support, yielding measured mean values of + 3.5 dB (maximum + 6 dB). This value is substantial partly because the
Recommended citation: Rapp, Mary, Densil Cabrera, and Shuai Lu. "A polytrihedral dome for acoustic retroreflection, and its application to creative-arts practice-led research." Applied Acoustics 195 (2022): 108860.
Download Paper