lasp/scripts/lasp_calibrate.py

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Tue Aug 14 12:49:27 2018
@author: J.A. de Jong - ASCEE
Description: apply calibration to measurement files.
"""
import numpy as np
import argparse
from lasp.lasp_measurement import Measurement
from lasp.lasp_common import P_REF
import os
spl_default = 94.
gain_default = 0.
parser = argparse.ArgumentParser('Calibrate device using'
' calibration measurement')
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parser.add_argument('--gain-setting', '-g',
help='DAQ Input gain setting during calibration in [dB]'
+ f' default = {gain_default} dB.',
type=float, default=gain_default)
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parser.add_argument(
'fn', help='File name of calibration measurement', type=str, default=None)
parser.add_argument('--channel', help='Channel of the device to calibrate, '
+ 'default = 0',
type=int, default=0)
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parser.add_argument('--spl', '-s', help='Applied sound pressure level to the'
f' microphone in dB, default = {spl_default}',
default=spl_default)
args = parser.parse_args()
m = Measurement(args.fn)
nchannels = m.nchannels
# Reset measurement sensitivity, in case it was set wrongly
m.sensitivity = np.ones(nchannels)
# Compute Vrms
Vrms = m.prms * 10**(args.gain_setting/20.)
prms = P_REF*10**(args.spl/20)
sens = Vrms / prms
print(f'Computed sensitivity: {sens[args.channel]:.5e} V/Pa')
if args.fn:
print('Searching for files in directory to apply sensitivity value to...')
dir_ = os.path.dirname(args.fn)
if len(dir_) == 0: dir_ = '.'
for f in os.listdir(dir_):
yn = input(f'Apply sensitivity to {f}? [Y/n]')
if yn in ['', 'Y', 'y']:
meas = Measurement(os.path.join(dir_, f))
meas.sensitivity = sens