The presentation of stimuli and collection of responses was achieved using the EPrime software (Version 2.0, Psychology Software Tools Inc., Sharpsburg, US). Acoustic stimuli were presented over HD280pro headphones (Sennheiser, Wedemark, Germany) via a custom built digital-to-analogue converter. The presentation level of the acoustic stimuli was calibrated to achieve an average presentation level between 70 and 73 dB sound pressure level (SPL). Calibration was performed by coupling the headphones to an artificial ear (Brüel & Kjær Type 4153) using a flatplate adaptor. Calibration measurements were made using a 0.5-inch pressure field microphone (Type 4192) connected to a sound level meter (Type 2260). Visual stimuli were presented on a computer-controlled visual display unit measuring 25.4 cm high by 44.5 cm wide positioned approximately 0.5 m away from the participants and at head height.
Type 4153
Manufactured by Brüel & Kjær
Sourced in Denmark
The Type 4153 is a precision pistonphone calibrator developed by Brüel & Kjær. Its core function is to provide a known sound pressure level for the calibration of microphones and other acoustic measurement equipment.
Automatically generated - may contain errors
4 protocols using type 4153
1
Multimodal Stimulus Presentation and Response Collection
2
Multimodal Stimulus Presentation and Response Collection
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The presentation of stimuli and collection of responses was achieved using the EPrime software (Version 2.0, Psychology Software Tools Inc., Sharpsburg, US). Acoustic stimuli were presented over HD280pro headphones (Sennheiser, Wedemark, Germany) via a custom built digital-to-analogue converter. The presentation level of the acoustic stimuli was calibrated to achieve an average presentation level between 70 and 73 dB sound pressure level (SPL). Calibration was performed by coupling the headphones to an artificial ear (Brüel & Kjær Type 4153) using a flatplate adaptor. Calibration measurements were made using a 0.5-inch pressure field microphone (Type 4192) connected to a sound level meter (Type 2260). Visual stimuli were presented on a computer-controlled visual display unit measuring 25.4 cm high by 44.5 cm wide positioned approximately 0.5 m away from the participants and at head height.
3
Sensory Perception Experimental Setup
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The experiment was conducted in a double-walled, sound-attenuated chamber (iac acoustics, Niederkrüchten, Germany) in the basement of the department building. Stimulus presentation and response registration were programmed in MATLAB utilizing the Psychophysics Toolbox extensions (Brainard, 1997 (link); Pelli, 1997 (link)).
The sounds to be adjusted were digitally generated 500-ms bursts of pink noise with rise/decay times of 10 ms. They were D/A converted by an external sound card (RME Multiface II) with 16-bit resolution at a sampling rate of 44.1 kHz, passed through a headphone amplifier (Behringer HA 8000 Powerplay PRO-8), and played back diotically via electrodynamic headphones (Beyerdynamics DT 990 PRO). Sound levels were verified at the headphones using a sound level meter (Brüel & Kjær 2250) and an artificial ear (Brüel & Kjær Type 4153).
The light sources to be adjusted were luminous 5.7 × 5.7 cm grayscale squares presented on a regular TFT monitor (1,280 × 1,024 pixels) on a black background (approx. 0.2 cd/m2). The pixel intensity of the square was adjustable between 0 (black) and 255 (white), corresponding to luminance values of 0.2 cd/m2 and 85 cd/m2. Luminance levels were verified using a photometer (L 1009, Lichtmesstechnik Berlin) and resulted in a very good fit to a power function relating pixel intensity (P) to luminance (Lv) by
The sounds to be adjusted were digitally generated 500-ms bursts of pink noise with rise/decay times of 10 ms. They were D/A converted by an external sound card (RME Multiface II) with 16-bit resolution at a sampling rate of 44.1 kHz, passed through a headphone amplifier (Behringer HA 8000 Powerplay PRO-8), and played back diotically via electrodynamic headphones (Beyerdynamics DT 990 PRO). Sound levels were verified at the headphones using a sound level meter (Brüel & Kjær 2250) and an artificial ear (Brüel & Kjær Type 4153).
The light sources to be adjusted were luminous 5.7 × 5.7 cm grayscale squares presented on a regular TFT monitor (1,280 × 1,024 pixels) on a black background (approx. 0.2 cd/m2). The pixel intensity of the square was adjustable between 0 (black) and 255 (white), corresponding to luminance values of 0.2 cd/m2 and 85 cd/m2. Luminance levels were verified using a photometer (L 1009, Lichtmesstechnik Berlin) and resulted in a very good fit to a power function relating pixel intensity (P) to luminance (Lv) by
4
Auditory Perception Experiment Setup
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The experiment was run with a computer (HP, Probook 650 G3 (HP Japan Inc., Tokyo, Japan)), using an in-house program coded with the LiveCode Community 9.0 package47 . The stimuli were presented to the participant in a double-walled soundproof booth (Music cabin, SD3 (Takahashi Kensetsu, Kawasaki, Japan)), through a headphone amplifier with a built-in D/A converter (TEAC, UD-H01 (TEAC Corporation, Tokyo, Japan)) and headphones (Beyerdynamic, DT 990 PRO (Beyerdynamic GmbH, Heilbronn, Germany)). The sound pressure levels of the stimuli at the headphones were adjusted to 73 dB SPL, using a 1-kHz calibration tone provided with the speech database. The sound pressure levels were measured with an artificial ear (Brüel & Kjær, type 4153 (Brüel & Kjær Sound & Vibration Measurement A/S, Nærum, Denmark)), a condenser microphone (Brüel & Kjær, type 4192), and a sound level meter (Brüel & Kjær, type 2260).
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