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  Rattles and squeeze toys: a proposal for a noise test code (with low measurement uncertainty)
 
 
Titel: Rattles and squeeze toys: a proposal for a noise test code (with low measurement uncertainty)
Auteur: Simmons, Christian
Jonasson, Hans
Verschenen in: International journal on injury control and safety promotion
Paginering: Jaargang 5 (1998) nr. 3 pagina's 117-128
Jaar: 1998-09-01
Inhoud: The new European Standard EN 71-1:1997 includes the presented measurement method for the determination of emission sound pressure levels of rattles and squeeze toys in order to declare and verify (check conformance with pertinent) noise emission values (limits). The toy industry has argued that reliable measurement methods are impossible to develop (since the noise of a toy depends on the operations of humans). They have also argued that restrictions (limits) on noise imply that toys must be manufactured with unrealistic margins because of the poor measurement uncertainty. This study, however, shows that it is possible to test rattles and squeeze toys by using human operators and still obtain reasonable values for the measurement uncertainty. The standard deviation of the measurement reproducibility will improve if several operators are used, and can be kept below 2 dB of the A-weighted sound exposure level (SEL or LpA,1s is) or Leq as well as of the C-weighted peak level Lpcpeak. This means that noise measurements on these toys can be performed with the same (or better) precision than the one obtained when applying ISO standards on machinery noise to verify conformance with EU directives on machinery safety (noise in the industry). The test method does not require expensive testing equipment; the measurements can be made in almost any ordinary room with some acoustical damping, using ordinary equipment for sound pressure level measurements.
Uitgever: Taylor & Francis
Bronbestand: Elektronische Wetenschappelijke Tijdschriften
 
 

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