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"text": [
"Requirement already satisfied: librosa in /usr/local/lib/python3.12/dist-packages (0.11.0)\r\n",
"Requirement already satisfied: audioread>=2.1.9 in /usr/local/lib/python3.12/dist-packages (from librosa) (3.1.0)\r\n",
"Requirement already satisfied: numba>=0.51.0 in /usr/local/lib/python3.12/dist-packages (from librosa) (0.60.0)\r\n",
"Requirement already satisfied: numpy>=1.22.3 in /usr/local/lib/python3.12/dist-packages (from librosa) (2.0.2)\r\n",
"Requirement already satisfied: scipy>=1.6.0 in /usr/local/lib/python3.12/dist-packages (from librosa) (1.16.3)\r\n",
"Requirement already satisfied: scikit-learn>=1.1.0 in /usr/local/lib/python3.12/dist-packages (from librosa) (1.6.1)\r\n",
"Requirement already satisfied: joblib>=1.0 in /usr/local/lib/python3.12/dist-packages (from librosa) (1.5.3)\r\n",
"Requirement already satisfied: decorator>=4.3.0 in /usr/local/lib/python3.12/dist-packages (from librosa) (4.4.2)\r\n",
"Requirement already satisfied: soundfile>=0.12.1 in /usr/local/lib/python3.12/dist-packages (from librosa) (0.13.1)\r\n",
"Requirement already satisfied: pooch>=1.1 in /usr/local/lib/python3.12/dist-packages (from librosa) (1.8.2)\r\n",
"Requirement already satisfied: soxr>=0.3.2 in /usr/local/lib/python3.12/dist-packages (from librosa) (1.0.0)\r\n",
"Requirement already satisfied: typing_extensions>=4.1.1 in /usr/local/lib/python3.12/dist-packages (from librosa) (4.15.0)\r\n",
"Requirement already satisfied: lazy_loader>=0.1 in /usr/local/lib/python3.12/dist-packages (from librosa) (0.4)\r\n",
"Requirement already satisfied: msgpack>=1.0 in /usr/local/lib/python3.12/dist-packages (from librosa) (1.1.2)\r\n",
"Requirement already satisfied: packaging in /usr/local/lib/python3.12/dist-packages (from lazy_loader>=0.1->librosa) (25.0)\r\n",
"Requirement already satisfied: llvmlite<0.44,>=0.43.0dev0 in /usr/local/lib/python3.12/dist-packages (from numba>=0.51.0->librosa) (0.43.0)\r\n",
"Requirement already satisfied: platformdirs>=2.5.0 in /usr/local/lib/python3.12/dist-packages (from pooch>=1.1->librosa) (4.5.1)\r\n",
"Requirement already satisfied: requests>=2.19.0 in /usr/local/lib/python3.12/dist-packages (from pooch>=1.1->librosa) (2.32.4)\r\n",
"Requirement already satisfied: threadpoolctl>=3.1.0 in /usr/local/lib/python3.12/dist-packages (from scikit-learn>=1.1.0->librosa) (3.6.0)\r\n",
"Requirement already satisfied: cffi>=1.0 in /usr/local/lib/python3.12/dist-packages (from soundfile>=0.12.1->librosa) (2.0.0)\r\n",
"Requirement already satisfied: pycparser in /usr/local/lib/python3.12/dist-packages (from cffi>=1.0->soundfile>=0.12.1->librosa) (2.23)\r\n",
"Requirement already satisfied: charset_normalizer<4,>=2 in /usr/local/lib/python3.12/dist-packages (from requests>=2.19.0->pooch>=1.1->librosa) (3.4.4)\r\n",
"Requirement already satisfied: idna<4,>=2.5 in /usr/local/lib/python3.12/dist-packages (from requests>=2.19.0->pooch>=1.1->librosa) (3.11)\r\n",
"Requirement already satisfied: urllib3<3,>=1.21.1 in /usr/local/lib/python3.12/dist-packages (from requests>=2.19.0->pooch>=1.1->librosa) (2.5.0)\r\n",
"Requirement already satisfied: certifi>=2017.4.17 in /usr/local/lib/python3.12/dist-packages (from requests>=2.19.0->pooch>=1.1->librosa) (2026.1.4)\r\n",
"Requirement already satisfied: soundfile in /usr/local/lib/python3.12/dist-packages (0.13.1)\r\n",
"Requirement already satisfied: cffi>=1.0 in /usr/local/lib/python3.12/dist-packages (from soundfile) (2.0.0)\r\n",
"Requirement already satisfied: numpy in /usr/local/lib/python3.12/dist-packages (from soundfile) (2.0.2)\r\n",
"Requirement already satisfied: pycparser in /usr/local/lib/python3.12/dist-packages (from cffi>=1.0->soundfile) (2.23)\r\n",
"Collecting noisereduce\r\n",
" Downloading noisereduce-3.0.3-py3-none-any.whl.metadata (14 kB)\r\n",
"Requirement already satisfied: scipy in /usr/local/lib/python3.12/dist-packages (from noisereduce) (1.16.3)\r\n",
"Requirement already satisfied: matplotlib in /usr/local/lib/python3.12/dist-packages (from noisereduce) (3.10.0)\r\n",
"Requirement already satisfied: numpy in /usr/local/lib/python3.12/dist-packages (from noisereduce) (2.0.2)\r\n",
"Requirement already satisfied: tqdm in /usr/local/lib/python3.12/dist-packages (from noisereduce) (4.67.1)\r\n",
"Requirement already satisfied: joblib in /usr/local/lib/python3.12/dist-packages (from noisereduce) (1.5.3)\r\n",
"Requirement already satisfied: contourpy>=1.0.1 in /usr/local/lib/python3.12/dist-packages (from matplotlib->noisereduce) (1.3.3)\r\n",
"Requirement already satisfied: cycler>=0.10 in /usr/local/lib/python3.12/dist-packages (from matplotlib->noisereduce) (0.12.1)\r\n",
"Requirement already satisfied: fonttools>=4.22.0 in /usr/local/lib/python3.12/dist-packages (from matplotlib->noisereduce) (4.61.1)\r\n",
"Requirement already satisfied: kiwisolver>=1.3.1 in /usr/local/lib/python3.12/dist-packages (from matplotlib->noisereduce) (1.4.9)\r\n",
"Requirement already satisfied: packaging>=20.0 in /usr/local/lib/python3.12/dist-packages (from matplotlib->noisereduce) (25.0)\r\n",
"Requirement already satisfied: pillow>=8 in /usr/local/lib/python3.12/dist-packages (from matplotlib->noisereduce) (11.3.0)\r\n",
"Requirement already satisfied: pyparsing>=2.3.1 in /usr/local/lib/python3.12/dist-packages (from matplotlib->noisereduce) (3.3.1)\r\n",
"Requirement already satisfied: python-dateutil>=2.7 in /usr/local/lib/python3.12/dist-packages (from matplotlib->noisereduce) (2.9.0.post0)\r\n",
"Requirement already satisfied: six>=1.5 in /usr/local/lib/python3.12/dist-packages (from python-dateutil>=2.7->matplotlib->noisereduce) (1.17.0)\r\n",
"Downloading noisereduce-3.0.3-py3-none-any.whl (22 kB)\r\n",
"Installing collected packages: noisereduce\r\n",
"Successfully installed noisereduce-3.0.3\r\n",
"Requirement already satisfied: pandas in /usr/local/lib/python3.12/dist-packages (2.3.3)\r\n",
"Requirement already satisfied: numpy>=1.26.0 in /usr/local/lib/python3.12/dist-packages (from pandas) (2.0.2)\r\n",
"Requirement already satisfied: python-dateutil>=2.8.2 in /usr/local/lib/python3.12/dist-packages (from pandas) (2.9.0.post0)\r\n",
"Requirement already satisfied: pytz>=2020.1 in /usr/local/lib/python3.12/dist-packages (from pandas) (2025.2)\r\n",
"Requirement already satisfied: tzdata>=2022.7 in /usr/local/lib/python3.12/dist-packages (from pandas) (2025.3)\r\n",
"Requirement already satisfied: six>=1.5 in /usr/local/lib/python3.12/dist-packages (from python-dateutil>=2.8.2->pandas) (1.17.0)\r\n"
]
}
],
"source": [
"!pip install librosa\n",
"!pip install soundfile\n",
"!pip install noisereduce\n",
"!pip install pandas"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "8bff4c02",
"metadata": {
"execution": {
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"source": [
"import os\n",
"import numpy as np\n",
"import librosa\n",
"import soundfile as sf\n",
"import noisereduce as nr\n",
"import pandas as pd"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "4dfbf6ff",
"metadata": {
"execution": {
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"tags": []
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"outputs": [],
"source": [
"# Load audio\n",
"def load_audio(file_path, sr=16000):\n",
" audio, sample_rate = librosa.load(file_path, sr=sr)\n",
" return audio, sample_rate\n",
"\n",
"# Bandpass filter for breathing range\n",
"from scipy.signal import butter, lfilter\n",
"\n",
"def butter_bandpass(lowcut, highcut, fs, order=5):\n",
" nyq = 0.5 * fs\n",
" low = lowcut / nyq\n",
" high = highcut / nyq\n",
" b, a = butter(order, [low, high], btype='band')\n",
" return b, a\n",
"\n",
"def bandpass_filter(data, lowcut=100, highcut=2000, fs=16000):\n",
" b, a = butter_bandpass(lowcut, highcut, fs)\n",
" y = lfilter(b, a, data)\n",
" return y\n",
"\n",
"# Noise reduction\n",
"def noise_suppression(audio, sr):\n",
" return nr.reduce_noise(y=audio, sr=sr, prop_decrease=1.0)\n",
"\n",
"# Full preprocessing pipeline\n",
"def preprocess_audio(file_path):\n",
" audio, sr = load_audio(file_path)\n",
" filtered = bandpass_filter(audio, fs=sr)\n",
" cleaned = noise_suppression(filtered, sr)\n",
" return cleaned, sr"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "1d0977cb",
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"execution": {
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"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Preprocessing complete. Audio files zipped at /kaggle/working/cleaned_audio.zip\n"
]
}
],
"source": [
"import os\n",
"import pandas as pd\n",
"import soundfile as sf\n",
"from zipfile import ZipFile\n",
"\n",
"input_dir = \"/kaggle/input/datasets/liamgraphics/simulated-ward-dataset\"\n",
"output_dir = \"/kaggle/working/cleaned_audio/\"\n",
"os.makedirs(output_dir, exist_ok=True)\n",
"\n",
"metadata = []\n",
"\n",
"for file_name in os.listdir(input_dir):\n",
" if file_name.endswith(\".wav\"):\n",
" file_path = os.path.join(input_dir, file_name)\n",
" cleaned_audio, sr = preprocess_audio(file_path) # your preprocessing function\n",
" \n",
" output_path = os.path.join(output_dir, file_name)\n",
" sf.write(output_path, cleaned_audio, sr)\n",
" \n",
" metadata.append({\n",
" \"file_name\": file_name,\n",
" \"sample_rate\": sr,\n",
" \"length_sec\": len(cleaned_audio)/sr\n",
" })\n",
"\n",
"# Save metadata CSV (optional, outside ZIP)\n",
"metadata_df = pd.DataFrame(metadata)\n",
"metadata_csv_path = os.path.join(output_dir, \"metadata.csv\")\n",
"metadata_df.to_csv(metadata_csv_path, index=False)\n",
"\n",
"# Create ZIP file containing only .wav files\n",
"zip_path = \"/kaggle/working/cleaned_audio.zip\"\n",
"with ZipFile(zip_path, 'w') as zipf:\n",
" for file_name in os.listdir(output_dir):\n",
" if file_name.endswith(\".wav\"): # only include audio files\n",
" file_full_path = os.path.join(output_dir, file_name)\n",
" zipf.write(file_full_path, arcname=file_name)\n",
"\n",
"print(f\"Preprocessing complete. Audio files zipped at {zip_path}\")"
]
}
],
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