Abstract: A method for identifying one or more noisy persons speaking in an open office or other open workplace environment, the method comprising; measuring acoustic level of speech in the workplace environment, analysing the voice characteristics of the persons speaking in order to distinguish the different speakers, estimating acoustic noise levels for each of the one or more persons speaking. A noise indicator system for identifying one or more noisy person(s) speaking in an open office or other open workplace environment comprising one or more microphones, a voice analyzer configured for analyzing voices recorded by the microphone(s), a noise level estimator configured for estimating the noise level of the voices, a data logging unit configured for recording and storing voice level data, a voice mapping unit configured for comparing recorded voice data with voice data stored in a voice profile data bank.