CLIENT

Babcock Brown

PROJECT DESCRIPTION

Detailed noise emission analysis of wind turbines and proposal of mitigation.

SCOPE OF WORK

INNOVA was initially engaged in a 3rd party role to assess a report written by another acoustical consultant firm which claimed that the wind turbines were noise compliant by recording a series of measurements in accordance with IEC 61400-11 (2005). Upon inspection of the work completed, INNOVA found that a more detailed near-field set of noise measurements was required to correctly isolate the noise issue. Noise measurements on a representative wind turbine unit were analyzed to distinguish the contributing noise emission from the individual turbine components, including the heat exchanger. Tonalities were also identified and traced to originating equipment – the heat exchangers at the base of the turbines. INNOVA confirmed the noise problem and found that it could be easily controlled with absorptive silencing.

ACOUSTICAL REQUIREMENTS

A function of the background ambient noise level and ANSI standard methodology used to mitigate noise complaints.

NOISE SOURCES

Wind Turbines - 2.3 megawatt Siemens MK II

RESULTS

INNOVA met all acoustical requirements set by the Client.