111 lines
2.6 KiB
Plaintext
111 lines
2.6 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "bcd07c1e-6722-44c7-b162-267f1341c2fe",
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"metadata": {},
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"source": [
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"# Frequency weighting plots"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "f0c4d6ef-69b2-4b5c-92fd-d987a11f3cbd",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Prerequisites, uncomment below in case of errors. Also for ipympl, restart Jupyter Lab if it was not installed\n",
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"\n",
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"!cd .. && maturin develop -F python-bindings\n",
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"#!pip install ipympl scipy matplotlib"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "23b45cf6-85bc-4eaa-8f27-77c5b354e772",
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"metadata": {},
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"outputs": [],
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"source": [
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"# If this does not work, install ipympl and reboot Jupyter Lab\n",
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"%matplotlib widget"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "96090ac9-2033-411d-8e45-0c6b375a268b",
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"metadata": {},
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"outputs": [],
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"source": [
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"import numpy as np\n",
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"import matplotlib.pyplot as plt\n",
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"from numpy import log10\n",
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"from lasprs import ZPKModel, FreqWeighting\n",
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"def level(a):\n",
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" return 20*np.log10(np.abs(a))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "52343e3d-63ef-4fc2-ad7e-85ca124efdac",
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"metadata": {},
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"outputs": [],
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"source": [
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"A = ZPKModel.freqWeightingFilter(FreqWeighting.A)\n",
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"C = ZPKModel.freqWeightingFilter(FreqWeighting.C)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "7d3cc799-4809-4ea4-8570-89ffbb751a5a",
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"metadata": {},
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"outputs": [],
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"source": [
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"freq = np.logspace(log10(2), log10(2e4), 200)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "ab22d9cc-03ae-4d58-b730-599b659f9dc0",
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"metadata": {},
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"outputs": [],
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"source": [
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"plt.figure()\n",
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"plt.title('Frequency response of weighting filters - magnitude')\n",
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"plt.semilogx(freq, level(A.tf(0, freq)))\n",
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"plt.semilogx(freq, level(C.tf(0, freq)))\n",
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"plt.legend(['A-weighting', 'Z-weighting'])\n",
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"plt.ylabel('Magnitude [dB]')\n",
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"plt.ylim(-50, 3)\n",
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"plt.xlabel('Freq. [Hz]')"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.12.3"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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