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“Uncertainty-noise” Le Mans
Acoustique
&
Techniques n° 40
Example of global approach of uncertainties in environmental
acoustics
Phase 4 : conclusion and synthesis of the work
At the end of his work, the acoustical consultant has to manage
the communication that is done around his work and the
perception that the client has of it.
The global quality of the work is when the given service as the
client perceives it corresponds to the waited service [8].
The global deviation is determined by 4 elementary deviations
(see figure) :
- The knowledge deviation : deviation between the demand of
the client and the perception of it by the consultant.
- The offer deviation : deviation between the perception of
the demand of the client and the content of the offer and
contract.
- The working deviation : deviation between the contract and
the delivered work.
- The communication deviation : deviation between the
delivered service and the perception of it by the client.
Fig. 7 : global approach of the uncertainties in prediction of environmental noise
Fig. 8 : chain of deviations in service quality (ZEITHALM and BITNER)
The various sources of uncertainties in acoustic consultancy work