Step Three. Acoustic Calibration Review The Acoustic Design Review or ADR is a qualitative analysis of a system design meanwhile the Level II Acoustic Calibration Review (ACR) is a quantitative measurement of performance. The ACR is performed by the calibrator using a real time analyzer (RTA) and an Energy Time Analyzer (ETA). An ACR also involves critical listening to judge performance. The analysis is used as a objective review of the actual performance of a system and room. In conjunction with the ADR it is the second half of a complete system review. The ACR process is required to properly calibrate the system, providing an objective profile of the system before and after calibration. A typical Level II includes basic calibration services but does not include more complex redesign or acoustical treatments. Depending on ACR findings, a basic calibration may not be enough if room or equipment problems are significant. The final conclusion of the ADR process may result in the creation of an advanced calibration plan if necessary. Each system/room is different. Equally important is the level of flexibility each client has regarding recommended layout changes or budget limitations. Another element included in the ADR/ACR is a diagnostic review of system operation. Simply put, there is no point searching for acoustical problems in a design without making sure all components are functioning properly, correctly wired and installed. The basic data provided by the ACR includes (description may vary from dealer to dealer):
Once we have a good understanding of what is actually happening sonically in the room and have performed a basic calibration, the calibrator can devise a strategy to solve any remaining problems if necessary; the advanced calibration plan. |