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

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

Daniel Menzel
, Hugo Fastl
, Thomas Brandt
, Thomas Stephan

Computation, Information and Technology

Technical University of Munich
University of Munich

Research output: Contribution to journal › Article › peer-review

Abstract

The free-field response of NordicNeuroLab AudioSystem electrostatic headphones for use in functional magnetic resonance imaging (fMRI) is determined by loudness comparisons with freefield 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 63Hz and 10 kHz is obtained when using the AudioSystem headphones with the described free-field equalizer.

Original language	English
Pages (from-to)	251-254
Number of pages	4
Journal	Acoustical Science and Technology
Volume	32
Issue number	6
DOIs	https://doi.org/10.1250/ast.32.251
State	Published - 2011

Keywords

Audio-visual interactions
Equalization
FMRI
Free-field
Headphones

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10.1250/ast.32.251

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abstract = "The free-field response of NordicNeuroLab AudioSystem electrostatic headphones for use in functional magnetic resonance imaging (fMRI) is determined by loudness comparisons with freefield 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 63Hz and 10 kHz is obtained when using the AudioSystem headphones with the described free-field equalizer.",

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author = "Daniel Menzel and Hugo Fastl and Thomas Brandt and Thomas Stephan",

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AU - Menzel, Daniel

AU - Fastl, Hugo

AU - Brandt, Thomas

AU - Stephan, Thomas

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N2 - The free-field response of NordicNeuroLab AudioSystem electrostatic headphones for use in functional magnetic resonance imaging (fMRI) is determined by loudness comparisons with freefield 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 63Hz and 10 kHz is obtained when using the AudioSystem headphones with the described free-field equalizer.

AB - The free-field response of NordicNeuroLab AudioSystem electrostatic headphones for use in functional magnetic resonance imaging (fMRI) is determined by loudness comparisons with freefield 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 63Hz and 10 kHz is obtained when using the AudioSystem headphones with the described free-field equalizer.

KW - Audio-visual interactions

KW - Equalization

KW - FMRI

KW - Free-field

KW - Headphones

UR - https://www.scopus.com/pages/publications/81255172241

U2 - 10.1250/ast.32.251

DO - 10.1250/ast.32.251

M3 - Article

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JO - Acoustical Science and Technology

JF - Acoustical Science and Technology

IS - 6

ER -

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

Abstract

Keywords

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