Integrated Noise Model Version 6.0
INM 6.0 represented a major change in noise modeling practices for FAA, in that the data and noise computation algorithms moved to a system that considers the spectral shape of the noise produced by the aircraft. This change eventually allowed INM to incorporate state-of-the-art noise propagation algorithms that account for acoustic effects currently not modeled. They included:
- terrain shielding,
- various meteorological conditions, and
- excess attenuation effects.
New Features
INM 6.0 noise enhancements included the:- Capability to employ time-above thresholds that vary with ambient noise levels from location to location., the model adds the
- Ability to calculate three new metrics from the C-weighted family through the use of spectral data.
- Ability to create user-defined C-weighted metrics.
- Ability for 100% flight contribution using detailed grid point analysis that allows a user to develop externally processed metrics, such as the number-above metric.
INM 6.0, released September 30, 1999, is the first full INM release since INM 5.1 (January, 1997), and it is the first in a new series of releases since INM 5.0 (August, 1995). INM 6.0 is distributed on CD-ROM accompanied with a User's Guide and it is supported to run in Windows 95/98/NT 4.0 operating systems. As with previous versions of INM, updates to the 6.x series will be made available for download to registered users.
- INM 6.0 Order Form (PDF)
