An active free-field equalizer for headphones used in functional magnetic resonance imaging

Daniel Menzel; Hugo Fastl; Thomas Brandt; Thomas Stephan

doi:10.1250/ast.32.251

PAPERS

An active free-field equalizer for headphones used in functional magnetic resonance imaging

Daniel Menzel, Hugo Fastl, Thomas Brandt, Thomas Stephan

著者情報

キーワード: Headphones, Free-field, Equalization, fMRI, Audio-visual interactions

ジャーナルフリー

2011 年 32 巻 6 号 p. 251-254

DOI https://doi.org/10.1250/ast.32.251

詳細

抄録

The free-field response of NordicNeuroLab AudioSystem electrostatic headphones for use in functional magnetic resonance imaging (fMRI) is determined by loudness comparisons with free-field equalized Beyerdynamic DT 48 headphones. Based on these measurements, an active equalizer with resonances at 0.55, 1.5, and 6.9 kHz is developed, realized, and tested. A free-field equivalent level independent of frequency within ±3 dB between 63 Hz and 10 kHz is obtained when using the AudioSystem headphones with the described free-field equalizer.

責任著者(Corresponding author)

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