Minor update

lrftubes.lyx

@@ -3920,7 +3920,7 @@ negative:
 \end_layout
 
 \begin_layout Chapter
-Segment properties and parameters
+Segment properties and arguments
 \begin_inset CommandInset label
 LatexCommand label
 name "chap:Segment-properties"
@@ -3928,6 +3928,20 @@ name "chap:Segment-properties"
 \end_inset
 
 
+\end_layout
+
+\begin_layout Standard
+\begin_inset Note Note
+status open
+
+\begin_layout Plain Layout
+Dit is meer een gebruikershandleiding van de technische achtergrond.
+ Misschien kunnen we hier een apart deel voor maken in de documentatie.
+\end_layout
+
+\end_inset
+
+
 \end_layout
 
 \begin_layout Section
@@ -4017,7 +4031,7 @@ Properties
 \end_layout
 
 \begin_layout Standard
-Once a segment has been constructed, its parameters become properties and
+Once a segment has been constructed, its arguments become properties and
  can be adjusted later on.
  For example, say 'duct' is an instance of the class PrsDuct and we want
  to change its radius.
@@ -4030,7 +4044,8 @@ Once a segment has been constructed, its parameters become properties and
 \end_inset
 
  m.
- Retrieving any measure of cross-sectional area is also possible: 
+ Retrieving any other measure of cross-sectional area is also possible:
+ 
 \begin_inset Formula $x=\mathrm{duct}.D$
 \end_inset
 
@@ -4064,7 +4079,7 @@ noprefix "false"
 \begin_inset Float table
 wide false
 sideways false
-status open
+status collapsed
 
 \begin_layout Plain Layout
 \noindent
@@ -4079,7 +4094,7 @@ status open
 \begin_inset Text
 
 \begin_layout Plain Layout
-property
+Property
 \end_layout
 
 \end_inset
@@ -4088,7 +4103,7 @@ property
 \begin_inset Text
 
 \begin_layout Plain Layout
-meaning
+Explanation
 \end_layout
 
 \end_inset
@@ -4111,24 +4126,7 @@ meaning
 \begin_inset Text
 
 \begin_layout Plain Layout
-Transfer matrix at radial frequency 
-\begin_inset Formula $\omega$
-\end_inset
-
- [
-\begin_inset ERT
-status open
-
-\begin_layout Plain Layout
-
-
-\backslash
-si{rad/s}
-\end_layout
-
-\end_inset
-
-]
+Transfer matrix
 \end_layout
 
 \end_inset
@@ -4175,7 +4173,7 @@ si{m}
 \begin_inset Text
 
 \begin_layout Plain Layout
-\begin_inset Formula $Z$
+\begin_inset Formula $Z(\omega)$
 \end_inset