This page explains the procedure for deciding where to place the speaker (SP) while checking its coverage area.
First, It will introduce a simulator called "EASE Focus" by AMFG. "EASE" is very famous as a simulation tool, the "EASE Focus" is a free tool that can easily simulate only line array SP. The illustrations on this page were created using "EASE Focus". It will be easier to understand if you read this page while using this tool. Please use this tool. Additionally, TOA provides SP data (.gll file) for "EASE".
Cover Area
How can I determine the edge of the coverage area?
It is determined by the required sound pressure for ambient noise. For example, if it requires 10dB, the edge will be ambient noise +10dB. >> Ambient Noise
It may also be determined by the required specifications.
It is determined by the required sound pressure for ambient noise. For example, if it requires 10dB, the edge will be ambient noise +10dB. >> Ambient Noise
It may also be determined by the required specifications.
Differences in coverage area between speakers
Each SP has a uniquely shaped coverage area.
This Line Array SP has a wide horizontal coverage area and a narrow vertical coverage area.
Mount it low and against a wall to make optimal use of its large coverage area. On the other hand, if it is installed in a high position, it cannot be used effectively no matter how it is installed. Either no coverage or only a very small coverage area is provided.
Mount it low and against a wall to make optimal use of its large coverage area. On the other hand, if it is installed in a high position, it cannot be used effectively no matter how it is installed. Either no coverage or only a very small coverage area is provided.
The HX series SP allows to change the connection angle of each unit. This feature allows this SP to provide a reasonably wide coverage area whether it is installed in a low or high place.
Differences in coverage area depending on frequency
Depending on the frequency, the shape of the cover area is different. The important thing here is that the ease of listening to speech is guaranteed by high frequencies. One of the important things for determining good simulation results is that all target areas are evenly covered at high frequencies.
Generally the high frequency coverage is narrower than that of the low frequency.
Generally the high frequency coverage is narrower than that of the low frequency.
The figure above shows the coverage area for each frequency of the line array SP mentioned above. Can you see that the installation method shown at the top of the figure is incorrect?
Trouble with high frequency response may occur in places where the high frequency range does not reach sufficiently.
>> See also this page for issues caused by High Frequency Less.
>> See also this page for issues caused by High Frequency Less.
Supplement and Overlap of Cover Area
Generally the high frequency coverage is narrower than that of the low frequency.
In simulation, you need to check the high frequency coverage area. If the coverage area is not large enough, add SP.
In simulation, you need to check the high frequency coverage area. If the coverage area is not large enough, add SP.
When adding SP, don't forget about sound direction. Add SP so as not to go against the direction of the sound as much as possible.
It should be designed so that the cover area of each SP does not overlap as much as possible.
These two results seem to have no difference.
If you display only the result of the lower SP, you can see that in the right case the lower SP covers the range of the upper SP and overlaps with the cover area of the upper SP.
If you display only the result of the lower SP, you can see that in the right case the lower SP covers the range of the upper SP and overlaps with the cover area of the upper SP.
On the right side of the upper figure, the 2F SP is covering up to 1F, The coverage area of 2 FSP is overlapping on the 1F SP coverage area largely.
>> See also this page for issues caused by overlap.
>> See also this page for issues caused by overlap.
However, overlap is not necessarily bad. As shown in the figure below, the overlap of the main SP cover area places the sound image in the middle. When overlapping SP coverage areas, be aware of whether the sound image needs to be placed in between and whether the distance from the audience is equal.
Supplement for Hidden Area
It is important to find a "hidden area" where the sound does not reach directly from the SP and install auxiliary SPs there.
In this place, the volume will decrease due to the blocking of the sound. Especially since high frequencies are blocked, the clarity of the voice deteriorates markedly. In accordance with the sound direction as much as possible, it is necessary to install SP dedicated to this place.
Reverberation
Although it is difficult to foresee realistic situations of reverberation and feedback from simulation results, the method to avoid as much as possible is obvious.
In a room with a high ceiling like this church, Set SP as close as possible to the audience and put out a small sound. There is no point in releasing sounds outside the audience area.