L1 Loudness Behind: Difference between revisions

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|RightBody = The L1 systems offer extremely wide horizontal coverage (approximately 180 degrees), however, we rarely consider loudness behind them.

If you find the ~~L1s~~ too loud when placed behind you, ~~putting~~ them beside or ahead of you will make very little difference for frequencies up to 1000 Hz. ~~Consider using~~ high-~~quality hearing protection~~.

If you find the L1 systems too loud when placed behind you, consider using high-quality hearing protection. Putting them beside or ahead of you will make very little difference for frequencies up to 1000 Hz or the sensation of loudness.

If you place the L1 beside you, the sound is very little different from directly in front. This is great for monitoring if you are on a shallow stage.

Behind the L1 system, the sound will sound muffled because the mid-high frequencies are more directional than the lows. In testing (below) the difference was about 3 dB SPL (Sound Pressure Level).

;Notes

:This 3 dB difference was measurable in a free field (no walls). When there are walls, the difference is less apparent due to room reflections.

:A change of 3 dB is accepted as the smallest difference in level that is easily heard by most listeners listening to speech or music. It is a slight increase or decrease in volume<ref> [https://www.e2s.com/references-and-guidelines/db-decibel-ratings db Decibel Ratings]</ref>.

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== Test Results ==

The average difference measuring in front of an L1 and directly behind it (180 degrees off-axis) is +3 dB SPL dBA and dBC.

The average difference measuring in front of an L1 and beside it (90 degrees off-axis) is +3 dB SPL dBA and dBC.

The noticeable difference is that the sound behind the L1 is muffled (mid-high frequencies less apparent).

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*A-weighted and C-weighted (dBA and dBC)

;Notes

:This 3 dB difference was measurable in a free field (no walls). When there are walls, the difference is less apparent due to room reflections.

:A change of 3 dB is accepted as the smallest difference in level that is easily heard by most listeners listening to speech or music. It is a slight increase or decrease in volume<ref> [https://www.e2s.com/references-and-guidelines/db-decibel-ratings db Decibel Ratings]</ref>.

==Further reading==

@@ Line 5: / Line 5: @@
 |RightBody = The L1 systems offer extremely wide horizontal coverage (approximately 180 degrees), however, we rarely consider loudness behind them.
-If you find the L1s too loud when placed behind you, putting them beside or ahead of you will make very little difference for frequencies up to 1000 Hz. Consider using high-quality hearing protection.
+If you find the L1 systems too loud when placed behind you, consider using high-quality hearing protection. Putting them beside or ahead of you will make very little difference for frequencies up to 1000 Hz or the sensation of loudness.
+If you place the L1 beside you, the sound is very little different from directly in front. This is great for monitoring if you are on a shallow stage.
+Behind the L1 system, the sound will sound muffled because the mid-high frequencies are more directional than the lows. In testing (below) the difference was about 3 dB SPL (Sound Pressure Level).
+;Notes
+:This 3 dB difference was measurable in a free field (no walls). When there are walls, the difference is less apparent due to room reflections.
+:A change of 3 dB is accepted as the smallest difference in level that is easily heard by most listeners listening to speech or music. It is a slight increase or decrease in volume<ref> [https://www.e2s.com/references-and-guidelines/db-decibel-ratings db Decibel Ratings]</ref>.
@@ Line 32: / Line 39: @@
 == Test Results ==
 The average difference measuring in front of an L1 and directly behind it (180 degrees off-axis) is +3 dB SPL dBA and dBC.
-The average difference measuring in front of an L1 and beside it (90 degrees off-axis) is +3 dB SPL dBA and dBC.
+The noticeable difference is that the sound behind the L1 is muffled (mid-high frequencies less apparent).
+<!--The average difference measuring in front of an L1 and beside it (90 degrees off-axis) is +3 dB SPL dBA and dBC. -->
@@ Line 42: / Line 51: @@
 *A-weighted and C-weighted (dBA and dBC)
+;Notes
+:This 3 dB difference was measurable in a free field (no walls). When there are walls, the difference is less apparent due to room reflections.
+:A change of 3 dB is accepted as the smallest difference in level that is easily heard by most listeners listening to speech or music. It is a slight increase or decrease in volume<ref> [https://www.e2s.com/references-and-guidelines/db-decibel-ratings db Decibel Ratings]</ref>.
 ==Further reading==