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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Imports"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Simple HRTF distance simulation"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Inverse of the speed of sound in air\n",
+    "delta = 1/343.0\n",
+    "# Initial delay for HUTUBS HRIRs measured at 1.47m radius\n",
+    "measured_radius = 1.5\n",
+    "initial_delay = measured_radius * delta\n",
+    "# Sampling rate\n",
+    "sr = 44100\n",
+    "\n",
+    "def distance_delay(sr, ir, distance):\n",
+    "    # Delays impulse response for the given distance\n",
+    "    delay = distance * delta\n",
+    "    delay_gap = delay - initial_delay\n",
+    "    delay_samples = int(abs(delay_gap) * sr)\n",
+    "    if delay_gap > 0:\n",
+    "        # Add zeros to the beginning of the impulse response\n",
+    "        ir = np.pad(ir, (delay_samples, 0), 'constant')\n",
+    "    elif delay_gap < 0 and delay_samples < len(ir):\n",
+    "        # Remove zeros from the beginning of the impulse response\n",
+    "        ir = ir[delay_samples:]\n",
+    "    return ir\n",
+    "\n",
+    "def distance_gain(ir, distance):\n",
+    "    # Scales impulse response for the given distance\n",
+    "    g = measured_radius / distance\n",
+    "    return g * ir\n",
+    "\n",
+    "def distance_ir(sr, ir, distance):\n",
+    "    # Delays and scales impulse response for the given distance\n",
+    "    ir = distance_delay(sr, ir, distance)\n",
+    "    ir = distance_gain(ir, distance)\n",
+    "    return ir"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "var",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}