diff --git a/kwave/utils/signals.py b/kwave/utils/signals.py
index deb4683a..e979f049 100644
--- a/kwave/utils/signals.py
+++ b/kwave/utils/signals.py
@@ -4,8 +4,6 @@
 
 import numpy as np
 import scipy
-from scipy.signal.windows import general_cosine
-from scipy.signal import get_window
 from numpy.fft import ifftshift, fft, ifft
 
 from .conversion import freq2wavenumber