Both EASE and EASE JR offer a wide variety of acoustic and electro-acoustic simulations that allow the user to investigate and analyze the acoustic performance of the room and its loudspeaker system.

The simulation results are usually displayed or mapped in color on what EASE calls Audience Areas (Area Mapping) or on the room surfaces (Room Mapping). Audience Areas are imaginary planes placed at 3.96 feet above the floor, the approximate height of a seated listener’s ears. In Room Mapping, users can choose which surfaces will be used.

The simulations can be run at a single sinusoidal frequency, over any one of the 21 1/3 octave frequency bands covered by EASE, over the entire 100 to 10,000 Hz frequency band covered by the program or over a selected frequency band.

The simulations take into account:

1. The room’s volume and the absorption characteristics of the rooms surfaces
2. The sensitivity (SPL output levels) and directivity of the loudspeakers
3. Air attenuation according to ISO Standard 9613-1
4. The shadowing effects of objects within the room
5. Interference
6. The effect of noise on intelligibility.
7. The effects of Temperature, Humidity & Barometric Pressure

Simulations available in both EASE and EASE JR include:

1. Direct SPL
2. Total SPL (Sum)
3. D/R Ratios (Direct to Reverberant Ratios)
4. Critical Distance
5. Alcons (Articulation Loss)
6. RASTI (Rapid Speech Transmission Index)
7. “C” Calculations (C7, C50, C80 & Csplit Clarity Ratios)
8. L Pressure Levels (L7, L50, L80 & Lsplit)
9. Arrival Time (First)
10. Lspk Overlap
11. ITD Gap (Initial Time Delay)
12. Aiming
13. Direct Sound Auralizations

Additional simulations available in EASE, but not available in EASE JR:

1. Local Decay Times
2. Standard Mapping With Reflections
3. Local Ray Tracing

The simulations can be run individually (for example, Direct SPL at 2000 Hz) or collectively under a new EASE feature, “All Mapping”. Under All Mapping, the program gathers all the information it needs to quickly display any of the available simulations at any frequency. Data display is controlled by a View Calculations window that allows the quick selection and viewing of any one of the simulation maps at any frequency or frequency band.

The View window also includes a Distribution tab that allows you to view the distribution of the simulation results.

All Mapping is a great time saver during any thorough performance investigation as it allows you to quickly jump from one simulation to another.

The calculations can be saved as Mapping files and then reviewed at a later time. Individual displays can be printed, copied to your computers clipboard, saved in a wide variety of file formats or saved as Open GL files.

EASE and EASE JR include EASEView, an Open GL viewing program. EASEView is a stand alone program that can be installed on any PC and allows any user to view and manipulate Open GL files. No License Key is needed to run EASEView.

This means users can copy EASEView onto a CD or floppy disc along with any number of open GL project screens and maps and then look at and manipulate them on any PC. In fact, the CD or floppy disc can be left with the client so they can review the project at their leisure.

Both EASE and EASE JR also include the ability to do Direct Sound Auralizations and Ray Tracing reflection studies. Direct Sound Auralizations allow you to use your ears to quickly check loudspeaker time alignment and level adjustments in multi loudspeaker systems.

The Ray Tracing capabilities of EASE are very extensive and include the ability to do impact studies and in depth analysis using an Acoustical Probe. EASE JR’s Ray Tracing capabilities are limited to 3rd order reflection studies. For more information on Ray Tracing, select Ray Tracing from the menu shown on the Right.