diff --git a/getMeasures.js b/getMeasures.js
index 2b08c6e..a808664 100644
--- a/getMeasures.js
+++ b/getMeasures.js
@@ -66,7 +66,7 @@ export function getSpen(args) {
     __spen.resolution = args.resolution;
     __spen.average = args.average;
     __spen.unit = args.view;
-    __spen.peak_level = args.level; //порог обнаружения гармоник
+    if (args.level != undefined) { __ausp.peak_level = args.level }; //порог обнаружения гармоник
 
     __spen.overlap = 0.5; //коэффициент перекрытия
     __spen.window = gtl.spec.rectangular; //тип окна