Differences

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--- ezfit:db_spl_hl_conversion [2009/08/20 10:08]
smayr
+++ ezfit:db_spl_hl_conversion [2010/09/09 15:09] (current)
ajdavis
@@ Line 1: / Line 1: @@
 ==dB SPL/HL Conversion==
-The calculation is based on the frequency the measurement was taken at.
-^ Frequency (Hz) ^ dB SPL ^ dB HL ^
-| 250       |      15|    0 |
-| 500       |       9|    0 |
-| 1000      |       3|    0 |
-| 2000      |      -3|    0 |
-| 4000      |      -4|    0 |
-| 8000      |       8|    0 |
-SPL = Sound Pressure Level
-HL = Hearing Level
 <charter>
 title = dB HL vs. dB SPL
 size = 800x330
-align = left
+align = center
 bgcolor = #ffffff
 type = line
@@ Line 23: / Line 10: @@
 XAxisName = Frequency (Hz)
 YAxisName = Sound Level (dB)
-legendEntries = Hearing Level (HL), Sound Pressure Level (SPL)
+legendEntries = Hearing Level (HL), Sound Pressure Level (SPL) Free Field
 labelSerie = 3
@@ Line 31: / Line 18: @@
 </charter>
+The calculation is based on the frequency the measurement was taken at.
+^ Frequency (Hz) ^ dB HL ^ dB SPL FF ^
+| 250       |          0 |  15|
+| 500       |          0 |   9|
+| 1000      |          0 |   3|
+| 2000      |          0 |  -3|
+| 4000      |          0 |  -4|
+| 8000      |          0 |   8|
+SPL = Sound Pressure Level Free Field
+HL = Hearing Level
 HL is used for Audiogram representation.  SPL is used for Target Curves representation. The HL chart has the Y-axis origin at the top left corner.  The SPL chart has the Y-axis origin at the bottom left corner.
-----
-**Audiogram using HL**
+== Examples ==
+=== Audiogram dB HL vs. dB SPL ===
+{{:ezfit:ezfit-audiogram-dbhl-vs-dbspl.jpg|Audiogram using dB HL vs. dB SPL}}
+=== Audiogram using HL ==
 {{:ezfit:audiogram-sample.jpg|Audiogram using HL. Source: Wikipedia, http://en.wikipedia.org/wiki/File:Audio23.jpg}}
@@ Line 43: / Line 46: @@
 Source: Wikipedia, http://en.wikipedia.org/wiki/File:Audio23.jpg
-----
+=== Target Curves using SPL ===
-{{:ezfit:ezfit-audiogram.jpg|Sample Audiogram using HL}}
-Source: ezFIT software
-----
-**Target Curves using SPL**
 {{:ezfit:ezfit-targetcurves.jpg|Sample Target Curves (thick dotted lines) and related Response Curves (thin continuous lines)}}
 Source: ezFIT software