Differences

This shows you the differences between two versions of the page.

--- en:wiki:anhang:anleitungen:erkennen_von_reflexionen_in_der_pulsantwort [14/01/2019 18:49] – murray_t
+++ en:wiki:anhang:anleitungen:erkennen_von_reflexionen_in_der_pulsantwort [14/01/2019 18:57] (current) – murray_t
@@ Line 60: / Line 60: @@
 {{:wiki:anhang:anleitungen:reflexionen:09_anl_reflexionen.png?nolink&}}
-. <font 12.0pt/inherit;;inherit;;inherit>Once you have measured the distance that the sound additionally requires, the cause can be determined as follows: Stretch a string from the tweeter of the loudspeaker to the listening position, lengthen the string by the specified distance and determine which areas can be touched with the string: The Blue line is the path of direct sound from the speaker to the measuring microphone. The red line is the longer path of the diffuse sound. Instead of a cord, using a laser range finder is helpful. This way, even reflection points from the ceiling of the listening room can be measured easily</font> .
+. <font 12.0pt/inherit;;inherit;;inherit>Once you have measured the distance that the sound additionally requires, the cause can be determined as follows: Stretch a string from the tweeter of the loudspeaker to the listening position, lengthen the string by the specified distance and determine which areas can be touched with the string: The Blue line is the path of direct sound from the speaker to the measuring microphone. The red line is the longer path of the diffuse sound. Instead of a cord, using a laser range finder is helpful. This way, even reflection points from the ceiling of the listening room can be measured easily.</font>
+=====  Footnote 1  =====
+<font 12pt/inherit;;inherit;;inherit>Undisturbed direct sound is considered to be -20 dB down from the peak impulse. You can see this in Acourate by choosing the ETC curve display at the bottom of the time window. Now hover the mouse over a reflected impulse that is within the first 20 ms after the main impulse. Observe at the top left of the window the dB value of the reflection compared to the main impulse.</font>
+{{:en:wiki:anhang:anleitungen:clipboard_image.jpg?nolink&400x671  |Early_Reflection_ETC}}