lasp.lasp_imptube.TwoMicImpedanceTube Class Reference

Public Member Functions
	__init__ (self, Measurement mnormal, Measurement mswitched, float s, float d1, float d2, float fl=None, float fu=None, periodic_method=False, D_imptube=50e-3, thermoviscous=True, **kwargs)
	Initialize two-microphone impedance tube methods.
	cut_to_limits (self, ar)
	getFreq (self)
	Array of frequencies, cut to limits of validity.
	G_AB (self, meas)
	k (self, freq)
	Wave number, or thermoviscous wave number.
	R (self, meas)
	alpha (self, meas)
	Acoustic absorption coefficient.
	z (self, meas)
	Acoustic impedance at the position of the sample, in front of the sample.
	zs (self, meas)
	Sample impedance jump, assuming a cavity behind the sample with thickness d2.

Public Attributes
	mnormal
	mswitched
	mat
	s
	d1
	d2
	fl
	fu
	thermoviscous
	D_imptube
	periodic_method
	channels
	N
	nfft
	C1
	freq
	il
	ul
	K

Detailed Description

Definition at line 17 of file lasp_imptube.py.

Constructor & Destructor Documentation

__init__()

lasp.lasp_imptube.TwoMicImpedanceTube.__init__	(		self,
		Measurement	mnormal,
		Measurement	mswitched,
		float	s,
		float	d1,
		float	d2,
		float	fl = None,
		float	fu = None,
			periodic_method = False,
			D_imptube = 50e-3,
			thermoviscous = True,
		**	kwargs
	)

Initialize two-microphone impedance tube methods.

Args: mnormal: Measurement in normal configuration mswitched: Measurement in normal configuration s: Microphone distance fl: Lower evaluation frequency fu: Lower evaluation frequency

kwargs: tuple with extra arguments, of which: N: Period length of periodic excitation obligatory chan0: Measurement channel index of mic 0 chan1: Measurement channel index of mic 1

Definition at line 18 of file lasp_imptube.py.

Member Function Documentation

alpha()

lasp.lasp_imptube.TwoMicImpedanceTube.alpha	(		self,
			meas
	)

Acoustic absorption coefficient.

Definition at line 147 of file lasp_imptube.py.

cut_to_limits()

lasp.lasp_imptube.TwoMicImpedanceTube.cut_to_limits	(		self,
			ar
	)

Definition at line 96 of file lasp_imptube.py.

G_AB()

lasp.lasp_imptube.TwoMicImpedanceTube.G_AB	(		self,
			meas
	)

Definition at line 106 of file lasp_imptube.py.

getFreq()

lasp.lasp_imptube.TwoMicImpedanceTube.getFreq

(

self

)

Array of frequencies, cut to limits of validity.

Definition at line 99 of file lasp_imptube.py.

k()

lasp.lasp_imptube.TwoMicImpedanceTube.k	(		self,
			freq
	)

Wave number, or thermoviscous wave number.

Definition at line 120 of file lasp_imptube.py.

R()

lasp.lasp_imptube.TwoMicImpedanceTube.R	(		self,
			meas
	)

Definition at line 136 of file lasp_imptube.py.

z()

lasp.lasp_imptube.TwoMicImpedanceTube.z	(		self,
			meas
	)

Acoustic impedance at the position of the sample, in front of the sample.

Definition at line 154 of file lasp_imptube.py.

zs()

lasp.lasp_imptube.TwoMicImpedanceTube.zs	(		self,
			meas
	)

Sample impedance jump, assuming a cavity behind the sample with thickness d2.

Definition at line 161 of file lasp_imptube.py.

Member Data Documentation

C1

lasp.lasp_imptube.TwoMicImpedanceTube.C1

Definition at line 83 of file lasp_imptube.py.

channels

lasp.lasp_imptube.TwoMicImpedanceTube.channels

Definition at line 71 of file lasp_imptube.py.

d1

lasp.lasp_imptube.TwoMicImpedanceTube.d1

Definition at line 52 of file lasp_imptube.py.

d2

lasp.lasp_imptube.TwoMicImpedanceTube.d2

Definition at line 53 of file lasp_imptube.py.

D_imptube

lasp.lasp_imptube.TwoMicImpedanceTube.D_imptube

Definition at line 68 of file lasp_imptube.py.

fl

lasp.lasp_imptube.TwoMicImpedanceTube.fl

Definition at line 55 of file lasp_imptube.py.

freq

lasp.lasp_imptube.TwoMicImpedanceTube.freq

Definition at line 84 of file lasp_imptube.py.

fu

lasp.lasp_imptube.TwoMicImpedanceTube.fu

Definition at line 61 of file lasp_imptube.py.

il

lasp.lasp_imptube.TwoMicImpedanceTube.il

Definition at line 86 of file lasp_imptube.py.

K

lasp.lasp_imptube.TwoMicImpedanceTube.K

Definition at line 94 of file lasp_imptube.py.

mat

lasp.lasp_imptube.TwoMicImpedanceTube.mat

Definition at line 50 of file lasp_imptube.py.

mnormal

lasp.lasp_imptube.TwoMicImpedanceTube.mnormal

Definition at line 47 of file lasp_imptube.py.

mswitched

lasp.lasp_imptube.TwoMicImpedanceTube.mswitched

Definition at line 48 of file lasp_imptube.py.

N

lasp.lasp_imptube.TwoMicImpedanceTube.N

Definition at line 74 of file lasp_imptube.py.

nfft

lasp.lasp_imptube.TwoMicImpedanceTube.nfft

Definition at line 78 of file lasp_imptube.py.

periodic_method

lasp.lasp_imptube.TwoMicImpedanceTube.periodic_method

Definition at line 70 of file lasp_imptube.py.

s

lasp.lasp_imptube.TwoMicImpedanceTube.s

Definition at line 51 of file lasp_imptube.py.

thermoviscous

lasp.lasp_imptube.TwoMicImpedanceTube.thermoviscous

Definition at line 67 of file lasp_imptube.py.

ul

lasp.lasp_imptube.TwoMicImpedanceTube.ul

Definition at line 87 of file lasp_imptube.py.

---

The documentation for this class was generated from the following file:

• src/lasp/lasp_imptube.py