diff --git a/mhkit/acoustics/base.py b/mhkit/acoustics/base.py
index a4c97d7c..7a68d6bc 100644
--- a/mhkit/acoustics/base.py
+++ b/mhkit/acoustics/base.py
@@ -73,7 +73,7 @@ def sound_pressure_spectral_density(P, fs, window=1):
     return out
 
 
-def apply_calibration(spsd, sensitivity_curve, fill_nan):
+def apply_calibration(spsd, sensitivity_curve, fill_value):
     """
     Applies custom calibration to spectral density values
 
@@ -83,7 +83,7 @@ def apply_calibration(spsd, sensitivity_curve, fill_nan):
         Mean square sound pressure spectral density in V^2/Hz.
     sensitivity_curve: xarray.DataArray (freq)
         Calibrated sensitivity curve in units of dB rel 1 V^2/uPa^2.
-    fill_nan: numeric
+    fill_value: numeric
         Value with which to fill values missing from calibration curve,
         in units of dB rel 1 V^2/uPa^2.
 
@@ -96,9 +96,11 @@ def apply_calibration(spsd, sensitivity_curve, fill_nan):
     # Read calibration curve
     freq = sensitivity_curve.dims[0]
     # Interpolate calibration curve to desired value
-    calibration = sensitivity_curve.interp({freq: spsd["freq"]}).drop(freq)
+    calibration = sensitivity_curve.interp({freq: spsd["freq"]}, method="linear").drop(
+        freq
+    )
     # Fill missing with provided value
-    calibration = calibration.fillna(fill_nan)
+    calibration = calibration.fillna(fill_value)
 
     # Subtract from sound pressure spectral density
     Sf_ratio = 10 ** (calibration / 10)  # V^2/uPa^2
@@ -248,6 +250,10 @@ def time_average(spsdl, window=60, method="median", method_arg=None):
     out.attrs["units"] = spsdl.units
     out.attrs["comment"] = f"Time average {method}"
 
+    # This coordinate hangs on for some reason
+    if method == "quantile":
+        out = out.drop_vars("quantile")
+
     return out
 
 
diff --git a/mhkit/acoustics/io.py b/mhkit/acoustics/io.py
index ca2081f1..5f5215d1 100644
--- a/mhkit/acoustics/io.py
+++ b/mhkit/acoustics/io.py
@@ -133,7 +133,7 @@ def read_hydrophone(
                 "valid_min": -max_sat,
                 "valid_max": max_sat,
                 "fs": fs,
-                "filename": filename.replace("\\", "/").split("/")[-1],
+                "filename": str(filename).replace("\\", "/").split("/")[-1],
             },
         )
 
@@ -272,10 +272,6 @@ def read_iclisten(filename, sensitivity=None, use_metadata=True):
     Sf = int(hphone_sensitivity.split(" ")[0])
     if use_metadata:
         sensitivity = Sf
-    # else:
-    #     warnings.warn(
-    #         f"Overriding manufacturer sensitivity {Sf} with user-defined sensitivity {sensitivity}."
-    #     )
 
     out = read_hydrophone(
         filename,