Bose Modeler Software Tutorial - Chapter 4 - Placing Listeners and Loudspeakers

Bose Professional Systems

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Bose ® Modeler ® Software Tutorial

Chapter 4: Placing Listeners and Loudspeakers

Objects in your model This chapter covers placing listeners and loudspeakers in a room model. The lessons in this chapter use the completed church model that can be found on the Modeler software installation CD. Follow these steps to open the completed church model: 1. Click File > Open Project...   2. In the Look in: dropdown menu click on the desktop (see Open the sample model on page 4 if you did not complete Chapter 1). 3. Open the Tutorial folder, then open the First Street Church   folder. 4. Open the file named First Street Church.pjt 5. In the Project window, double click on the Design 2 model. 6. After the Design 2 model opens, close the Project window.

Figure 4.1 - Design 2 model

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Bose ® Modeler ® Software Tutorial

Adding listener locations Modeler software enables you to establish listener positions throughout your model using the Place Listener tool. Listeners provide reference points in your model from which to analyze acoustic predictions.

Note: Listener locations can be added to Floor , and Seating type surfaces.

Follow these steps to add a listener location to the model: 1. Select the Place Listener tool in the Draw toolbar.

Figure 4.2 -Place Listener tool 2. Click at x: - 5.0 y: 4.0 z: 0.0 to place a listener location. The number in the green box is the listener identifier. The arrow indicates the direction in which the listener is facing (the yaw). By default, listeners face in the positive X direction.

Figure 4.3 - A listener location

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Bose ® Modeler ® Software Tutorial

3. Move the listener location by clicking and dragging the icon in the center of the circle. Move the listener to x: 0.0 y: - 6.0 z: 0.0 . 4. Adjust the direction the listener is facing by dragging the blue yaw arrow in the listener circle. Click near the tip of the arrow and drag it around the circle. The listener should face in the direction that a listener would face in the venue.

Figure 4.4 - Adjust the yaw of a listener 5. Select the Listeners tab in the Detail window and enter 1 (m)   in the Ear Height field to specify that the listeners ears are located 1 meter off of the ground, or that they are sitting down. If the listeners were standing up, or sitting on the floor, you could enter a higher or lower value for Ear Height to best represent the height of the listeners.

Figure 4.5 -Ear Height column in Listeners tab

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Bose ® Modeler ® Software Tutorial

    

6. Add three more listener positions and place them in the three remaining quadrants in the church. Point the yaw for each listener toward the end of the church with the smaller rounded alcove, and set the ear height for each at 1 m. When you are done, your listeners should be placed like this:

Figure 4.6 - Listeners placed in model 7. Click the Save button to save your work.

Creating a loudspeaker layout The ability to simulate a loudspeaker installation is one of the central features of Modeler software. In this section we will cover the Loudspeaker Database, as well as how to place loudspeakers in your model. Creating a loudspeaker layout enables you to evaluate the sound in your model and make adjustments to achieve the best possible sound system design.

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Bose ® Modeler ® Software Tutorial

The Loudspeaker Database The Loudspeaker Database contains all loudspeakers available for use in Modeler software.

Note: Visit http://pro.bose.com for more information on Bose ®     Professional Loudspeakers including product information and technical data sheets. When you are connected to the internet, simply click the Web tab in the Modeling window.

Follow these steps to open the Loudspeaker Database: 1. In the Database menu, choose Loudspeaker Database , or click on the Loudspeaker Database button on the Database toolbar:

Figure 4.7 -Loudspeaker Database button

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Bose ® Modeler ® Software Tutorial

2. The Loudspeaker Database window opens:

Figure 4.8 -Loudspeaker Database window The Loudspeaker Database window displays the acoustic and technical characteristics of each loudspeaker. The list of folders on the left side of the window is similar to Windows Explorer. When you select a loudspeaker from a folder on the left side of the window, the technical specifications appear in the fields on the right side of the window. Follow these steps to view data for a loudspeaker: 1. Click on the plus (+) sign next to the Bose folder to open the folder. 2. Select a loudspeaker by clicking on it. 3. The data for the loudspeaker is displayed in the fields to the right of the window. Click on one of the view buttons in the toolbar to change the type of data being displayed in the window:

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Figure 4.9 - Loudspeaker view buttons

Bose ® Modeler ® Software Tutorial

 View Magnitude - displays the polar balloon of the loudspeaker  View Time Offset - displays the plot of sound propagation time of the loudspeaker  View Enclosure - displays the loudspeaker wireframe enclosure  Polar Plots - displays a vertical polar grid when viewing magnitude and time offset data 4. Close the Loudspeaker Database window.

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Bose ® Modeler ® Software Tutorial

Clusters A group of adjacent loudspeakers is considered a loudspeaker cluster. Modeler software automatically designates loudspeakers as belonging to the same cluster if you place them close enough together in the model. This distance is specified in the Cluster Radius setting in the Calculation tab of the Preferences dialog box:

Figure 4.10 -Cluster Radius setting in the Preferences dialog box For example, if the Cluster Radius is set to 2 m , loudspeakers placed within 2 meters (in any direction) of each other will be assigned the same cluster number. Follow these steps to change the cluster radius setting: 1. Open the Preferences dialog box by choosing Edit > Preferences , or by pressing Ctrl + R . 2. Select the Calculation tab. 3. Under Cluster Radius enter 2 to specify a cluster radius of 2 m.

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Bose ® Modeler ® Software Tutorial

Figure 4.11 - Speakers placed within the lighter shaded sphere will be assigned the same cluster number as the existing loudspeaker. The Zone, Tier, and Index numbers of a loudspeaker are set to 1 by default. You can change these values in the Loudspeakers tab after placing a loudspeaker.

Note: A chain of loudspeakers will belong to a single cluster if each loudspeaker is within the cluster radius distance of the next.

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Bose ® Modeler ® Software Tutorial

Placing loudspeakers within a model Follow these steps to place loudspeakers in your model: 1. Select the Place Loudspeaker tool in the Loudspeaker toolbar:

Figure 4.12 -Place Loudspeakers tool 2. Click at x: - 12.0 y: 0.0 z: 0.0 in the Design 2 model and the Place Loudspeaker window opens:

  Figure 4.13 -Place Loudspeaker window  Click the plus ( + ) sign next to the Bose folder to open it and reveal the list of Bose loudspeakers in the database.  Click Bose 502B 6_0 which is a loudspeaker for low frequency sound.  Enter a Z Coordinate (height) of 6 m .       Click OK . The Place Loudspeaker window closes and a loudspeaker graphic appears in the model. The numbers at the loudspeaker graphic refer to the Cluster, Zone, Tier and Index of this loudspeaker:

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Tip:

Bose ® Modeler ® Software Tutorial

Figure 4.14 - Loudspeaker identifier numbers 3. Place another loudspeaker 1 meter in the positive Y direction from the Bose 502B ® loudspeaker by clicking at x: - 12.0 y: 1.0 . The Place Loudspeaker window opens.  Select a Bose 402-II Biamp 6_0 loudspeaker.

Visit http://pro.bose.com for technical data and information on the loudspeakers in Modeler software. When you are connected to the internet, simply click the Web tab in the Modeling window.

 Make sure the Z Coordinate is set to 6 m so that this   speaker is at the same height as the Bose 502B ® . 4. Click OK . Your second loudspeaker is placed adjacent to the first one.  The cluster radius is set to 2 meters, so the Bose 402-II ®       Biamp loudspeaker that you placed is automatically assigned to Cluster 1 because it was placed within 2 meters of the Bose 502B ® loudspeaker.

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