
 Answer: Why can't I turn my speaker all the way up? 


Posted: Thu Jul 01, 2010 7:10 pm 


Jim Mobley 
Member 


Joined: 27 Jul 2005 
Posts: 134 
Location: Foothill Ranch, California, USA 






With the update to EASE 4.3, the metaphor for SPL mapping has been changed to broad band pink noise rather than the multitone metaphor that was used in previous versions.
Here's a specific example, EASE has twentyone, 1/3 octave bands; open the default Sphere loudspeaker, a loudspeaker with a 100 watt power handling. In the properties for the Sphere, click on All Off to set all bands to 0 dB SPL. Now for 1000 Hz enter a value of 100 watts in the Ele. Power column and click Apply. Note that the values remain black, also look at the bottom of the frequency response graph. See that the Max value and current values are both at 100 watts. Now pick 1250 Hz and enter a value of 100 watts there and click Apply. Now you will see the Ele. Power values turn red, but also note that the Max power value remains at 100 watts but the Current value is now 200 watts. You are applying 100 watts at 1000 Hz and 100 watts at 1250 Hz for a total of 200 watts of power. You have to distribute the power the loudspeaker can handle across the frequency range. You can do this by clicking the All to Max button and click apply. You'll see that the Ele. Power values all go to 4.762 watts which = 100/21; 100 watts divided evenly into twentyone bands.
That's great you say, but how do I know how loud it will get? The same way you would with an SPL meter. As an example, place the Sphere in a model above a normal audience area at Z = 11.2 m (36.75 ft.). Be sure your area is the normal height of 1.2 m (3.94 feet), the speaker to area distance is 10 m (32.81 ft.). So, 1/10 = 0.1, Log 0.1 = 1 x 20 = 20, so 110  20 = 90 dB SPL, and if you set the map to show Direct SPL, Broadband, you'll see 90 dBSPL directly below the loudspeaker. (You'll have to click the mouse in Peek mode, due to rounding EASE actually computes 89.8 dBSPL directly under the Sphere.)
This change was made so that the band averaging would work correctly and to allow mapping with Aweighting.
Note that with DLL/GLL loudspeakers, the levels are listed as attenuation, so 0 is full up. 

_________________ Best regards,
Jim Mobley
Sr. Application Engineer
RenkusHeinz, Inc.
19201 Cook St.
Foothill Ranch, CA 92610 USA
TEL: +19495889997
FAX: +19495889514
www.renkusheinz.com
mailto:jim@renkusheinz.com 






Posted: Sat Sep 27, 2014 3:02 am 


jitendra 
Member 


Joined: 01 Jun 2010 
Posts: 4 
Location: Singapore 






Hi Jim,
Thank you for the detailed information.
For public address system simulations should we take multitone or pink noise setting as generally for announcements only speech signal will be used?
Thanks
Jitendra 




Posted: Thu Oct 02, 2014 9:44 pm 


AFMG Pedro Lima 
Forum Moderator 


Joined: 05 Jun 2010 
Posts: 246 
Location: Brazil 






pink noise 




Posted: Wed Feb 07, 2018 11:10 am 



Dear All,
Need your advise please. I'm using EASE 4.4, the problem I have now is that I always get a better simulation result using multitone rather than pink noise. If I were to use pink noise which is the recommended setting according to manual, I would need to use 9x20W speakers at full tap, distanced at 5m, to cover an area with dimension of 4x44m, just to get an ideal SPL distribution. Whereas if I use multitone, I would only need to tap at 5W and I get a much better result.
Please advise and thanks in advance.
Regards,
Infrasonic 

_________________ It's all about how you feel. 






Posted: Wed Feb 28, 2018 10:50 am 


Waldemar 
Member 


Joined: 05 Dec 2005 
Posts: 112 







Hi Infrasonic,
as explained in the manual, if you use multitone, EASE puts the maximum voltage (power) in every 3rd octave calculation. This could be wrong, since the speaker cannot perform those levels for a broadband signal. 

_________________ Best Regards
SDA, Waldemar Richert 






Posted: Thu Jan 27, 2022 3:28 pm 



In the properties for the Sphere, click on All Off to set all bands to 0 dB SPL. Now for 1000 Hz enter a value of 100 watts in the Ele.Power column and click Apply.
Note that the values remain black, also look at the bottom of the frequency response graph. See that the Max value and current values are both at 100 watts. Now pick 1250 Hz and enter a value of 100 watts there and click Apply. Now you will see the Ele.
Power values turn red, but also note that the Max power value remains at 100 watts but the Current value is now 200 watts. You are applying 100 watts at 1000 Hz and 100 watts at 1250 Hz for a total of 200 watts of power. You have to distribute the power the loudspeaker can handle across the frequency range.
You can do this by clicking the All to Max button and click apply. You'll see that the Ele. Power values all go to 4.762 watts which = 100/21; 100 watts divided evenly into twentyone bands.
That's great you say, but how do I know how loud it will get? The same way you would with an SPL meter. As an example, place the Sphere in a model above a normal audience area at Z = 11.2 m (36.75 ft.
Be sure your area is the normal height of 1.2 m (3.94 feet), the speaker to area distance is 10 m (32.81 ft.). So, 1/10 = 0.1, Log 0.1 = 1 x 20 = 20, so 110  20 = 90 dB SPL, and if you set the map to show Direct SPL, Broadband, you'll see 90 dBSPL directly below the loudspeaker.
You'll have to click the mouse in Peek mode, due to rounding EASE actually computes 89.8 dBSPL directly under the Sphere. 







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