diff --git a/Hardware_development/Measurements/v01/Audio_1.txt b/Hardware_development/Measurements/v01/Audio_1.txt
index c2a8e37..097ea52 100644
--- a/Hardware_development/Measurements/v01/Audio_1.txt
+++ b/Hardware_development/Measurements/v01/Audio_1.txt
@@ -1,10 +1,10 @@
  freq - frequency in Hz
  7.40 - excitation from two batteries in series (7.40V)
-15.00 - excitation from from batteris in series (hypotetical, power supply is used)
+15.00 - excitation from four batteries in series (hypothetical, power supply is used)
 
 Audio amplifier TDK2040 is tested. 
-Single cascade is used with 30 capacitors and 60 (30x two-in-series) diodes 1N4007.
-Power supplied by RIGOL DP832 at frequency for max output DC voltage is measured, too.
+A single cascade is used with 30 capacitors and 60 (30x two-in-series) diodes 1N4007.
+Power supplied by RIGOL DP832 at the frequency for max output DC voltage is measured, too.
 Sinusoidal excitation so that audio goes into saturation. 
  
  ETD49 core with 4 isolated layers as secondary, no gaps and 3-turn primary