Simultaneous shipboard noise-and-vibration annoyance rating
conference paper
Report on a field study of the subjective equivalence of shipboard accoD1DOdation noise and vibrations. Definition of the physical "dose" by means of ISO/R 1996 noise rating scale (NR, sound pressure level in octave bands) and of a new analogous and matched vibration rating scale (VR, acceleration, mostly at discrete frequencies), evolved from VDI 2057 K-value, Definition of the subjective "effect", viz. the annoyance judgement by experienced and responsible observers (senior deck- and engineer officers, booking officers, acousticians) as expressed on simple category scales. Examples of evidence that hypothesis works: useful dose-effect correlations and no contradictory results in all 85 cases available in TPD files from 14 ships for which reliable data was obtained. Conclusion that shipboard vibration problems cannot be treated adequately without taking into account that people apparently undergo noise and vibrations on board as one coherent environment agent affecting their proficiency and their satisfaction. By means of the matched NR- and VR-scales it can be found out, whether annoyance due to noise or to vibrations prevails, and which should be considered for reduction primarily.
Topics
TNO Identifier
267370
Source title
Proceedings Internoise 1979
Pages
579-584