Temporal integration of partial loudness of helicopter-like sounds

Josef Schlittenlacher, Brian C.J. Moore

Research output: Chapter in Book/Conference proceedingChapter

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Abstract

When developing new vehicles that are to be operated in existing background noise, such as electric vertical take-off and landing aircraft in cities, a sound design goal should be to minimize the loudness in the given background noise. Rotorcraft sounds are characterized by short bursts of noise and the choice of rotor size and number allows variation of their temporal characteristics. We asked participants to compare the loudness of a reference sequence of bursts of noise with a burst duration of 20 ms with that of a test sequence for which the burst duration was 1, 2, 5 or 10 ms. For both sequences there were 20 bursts/s. A two-interval, two-alternative forced-choice task and a 1-up/1-down procedure was used. Simulated street noise was presented simultaneously with the noise bursts, and had the same root-mean-square (RMS) level as the fixed reference train of bursts of about 65 dB SPL. Initial results indicate that for equal loudness of the test and reference sequences, the level is markedly lower for a short burst duration than for a longer burst duration. This means that at a fixed equivalent sound pressure level partial loudness increases with decreasing burst duration.
Original languageEnglish
Title of host publicationINTER-NOISE and NOISE-CON Congress and Conference Proceedings
Subtitle of host publicationInterNoise21
Place of PublicationWashington, D.C.
PublisherThe Institute of Noise Control Engineering of the USA, Inc.
Pages4767-4772
Number of pages6
ISBN (Print)9781732598652
DOIs
Publication statusPublished - 1 Aug 2021

Publication series

NameINTER-NOISE and NOISE-CON Congress and Conference Proceedings
PublisherInstitute of Noise Control Engineering
ISSN (Print)0736-2935

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