Cross-modality matching of loudness to brightness for flashes of varying luminance and duration.

Lewis, Mark F.; United States. Office of Aviation Medicine

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Cross-modality matching of loudness to brightness for flashes of varying luminance and duration.

1967-08-01
By Lewis, Mark F.

[PDF-353.50 KB]

English

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Details:

Creators:

Lewis, Mark F.
Corporate Creators:

United States. Office of Aviation Medicine
Subject/TRT Terms:

[+]

Acoustics Aviation Brightness Brightness Perception Evaluation Experiments Flashing Beacons Human Subject Testing Loudness Luminance Luminescence Oscillators, Electric Photometers Photometry Signal Generators Signal Lights Signal Lights--Evaluation Sound
Publication/ Report Number:

AM 67-16 ; DOT/FAA/AM-67/16

AM 67-16 ; DOT/FAA/AM-67/16 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Civil Aerospace Medical Institute
Abstract:

On occasion pilots must make judgments about the brightness of signal lights during night flight. The current study was directed to determining the relation between brightness and flash luminance and duration without use of a visual comparison stimulus. Each subject adjusted the intensity of a 1000 Hz tone presented monaurally by earphone until the subject was satisfied that the tone was as loud as the flash was bright.

The results showed the intensity of the matching tone increased as a function of both flash luminance and duration. Agreement with Bloch's law was obtained. The critical duration of Bloch's law was shown to decrease as stimulus energy increased. No evidence of Broca-Sulzer maxima was obtained. The results were interpreted as indicating that the Broca-Sulzer effect may only be obtained when a visual comparison stimulus is presented.
Format:

PDF
Collection(s):

FAA Civil Aerospace Medical Institute US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:24fe2ae7ea0e87a3457b61686ff5f2262f7980827c6c0add0e984f547f9721c6
Download URL:

https://rosap.ntl.bts.gov/view/dot/20829/dot_20829_DS1.pdf
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Cross-modality matching of loudness to brightness for flashes of varying luminance and duration.

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