Room Impulse Response Generator by Stephen McGovern

This program calculates the acoustical impulse response of a rectangular room (audio processing, video processing, room)

rir.m

Butterworth Filters by Chad Greene

Highpass, lowpass, bandpass, and bandstop Butterworth frequency filters. (filtering, dsp, frequency)

[filtered_signal,filtb,filta]=bandpass_butterworth(inputsig...

[filtered_signal,filtb,filta]=bandstop_butterworth(inputsig...

[filtered_signal,filtb,filta]=hipass_butterworth(inputsigna...

Seawater Acoustic Absorption Calculator by Chad Greene

Returns absorption coefficient a in dB/m, given frequency, temperature, and hydrostatic pressure. (acoustics, seawater, absorption)

seawater_absorption.m

Prosperetti's Phi calculator by Chad Greene

Returns the Phi argument given by Prosperetti's, The thermal behaviour of oscillating gas bubbles. (acoustics, bubbles)

Prosperetti_Phi(gamma,Dg,omega,ro)

dirplot by Steve Rickman

Makes polar directivity plots. (directivity, antenna, polar)

dirplot(theta,rho,line_style,params)

Two-phase medium sound speed calculator by Chad Greene

Uses A.B. Wood's model to calculate the bulk sound speed of a two-phase fluid medium. (sound speed, acoustics)

c_wood2(c1,rho1,c2,rho2,VF)

Minnaert bubble models by Chad Greene

Functions to calculate the radius, volume, or acoustic oscillation frequency of a gas bubble. (acoustics, bubble, bubbles)

minnaert_freq(r_m,P_Pa,rho_l,nu,Z)

minnaert_rad(fo,P_Pa,rho_l,nu,Z)

minnaert_vol(fo,P_Pa,rho_l,nu,Z)

Water sound speed calculator by Chad Greene

Calculate the sound speed of water for any given temperature, pressure, and salinity. (acoustics, sonar, sofar)

c_water.m

raytrace by Val Schmidt

A function to model acoustic refraction due to variations in sound speed. (acoustics, ray tracing, refraction)

raytrace(xo,zo, theta0,tt,zz,cc,plotflag)

Calculate the harmonic mean sound speed vertically through a profile by Val Schmidt

Given a vertical sound speed profile, calculate the harmonic mean speed of sound to some depth. (acoustics, ocean, singlebeam)

sndspd_mean(z,ssp,d)

Sound Pressure Level Calculator by Chad Greene

Function calculates sound pressure level in decibels, given a pressure signal in pascals. (acoustics, sound pressure level, spl)

spl(p_Pa,ref)

Image-source method for room impulse response simulation (room acoustics) by Eric A. Lehmann

Simulates audio data at one or more microphones from a source moving in a reverberant environment (acoustics, room impulse response, image source)

ISM_AbsCoeff.m

ISM_AudioData(RIRFileName,SrcSignal,varargin)

ISM_RIR_DecayTime(delta_dB_vec,rt_type,rt_val,aa,room,X_src...

Fast simulation of acoustic room impulse responses (image-source method) by Eric A. Lehmann

Fast simulation of audio data at one or more microphones from a source moving in a reverberant room (audio processing, acoustics, image source)

ISM_AbsCoeff.m

ISM_AudioData(RIRFileName,SrcSignal,varargin)

ISM_RIR_DecayTime(delta_dB_vec,rt_type,rt_val,aa,room,X_src...

Archivox Room Impulse Response Measurement by Philip Robinson

Used to measure multi-channel acoustic room impulse responses and loudspeaker directivity. (acoustics, room impulse response, measurement)

Archivox_RIR(varargin)

Acoustic Singal Transmission Loss due to single or double wall by Felipe Tavera

This simple guide enables the user to calculate the Transmission loss index in dB for a wall set. (acoustics, design, architecture)

Arquitectonica(varargin)

Calculation of mel and hertz by Fabian Tomaschek

Calculates between psychometrical MEL and acoustical Hertz scala (psychology, metrical, acoustics)

psychmec(input, inputmode)

Feedback active noise control system using FbLMS algorithm by Agustinus Oey

Use of feedback active control system for reducing narrow band noise. (least mean square, active control, acoustics)

try_fblms.m

Active noise control system using FxLMS algorithm by Agustinus Oey

Implementation of FxLMS algorithm for a single channel feed-forward active noise control system. (lms, fxlms, active control)

try_fxlms.m

Acoustic Absorption in Seawater by Colin Jemmott

Calculates the acoustic absorption of seawater in dB/km. (acoustics, oceanography, absorption)

absorption(freq, Z, T, S, pH)

Sound Transmission Class STC by Edward Zechmann

Program calculates Sound Transmission Class (STC) from transmission loss data. (signal processing, acoustics, transmission loss)

[A2, A_str, real_digitsL, real_digitsR, imag_digitsL, imag_...

[A_str]=SI_prefix_num(A)

[Fsn, p, q, errors]=get_p_q(Fs, Fsd, tol)

Subsample Delay Estimation by Travis Wiens

Demonstrates a number of methods of estimating the delay between two signals to subsample accuracy. (delay estimation, acoustics, radar)

[e f_e G P]=zzb(s,n1,n2, f_s, D, N_calc)

[x_max y_max A]=crit_interp_p(y,x)

delay=delayest_3point(u2,u1,method,estimator,parameter);

RBF Acoustic Tomography by Travis Wiens

Recreate temperature and flow fields from acoustic time-of-flight data. (acoustic tomography, tomography, temperature)

Omegapsi=Omegapsi_rbf(Xc,X1,X2,k_i,c0,basisfunction)

Phi_int=rbf_integral(Xc,X1,X2,k_i,basisfunction)

[W phi]=train_rbf(X,Y,Xc,k_i,basisfunction)

Tiny FDTD v1.0 by Nick Clark

Minimal acoustics simulation in 1, 2 or 3D (fdtd, 3d, 2d)

Tiny_FDTD_v1.m

Green's function in a room by Cristian Gutierrez Acuna

room acoustics (simulation, green, function)

AxialMode(n1,l1,rA,r0A,k)

GreenFunction(r0,r)

GreenFunction2(r0,r,f0)

BEM Code for 2D Pulsating Cylinder by Agustinus Oey

2-D Helmholtz Integral Equation code for computing sound pressure given by a pulsating cylinder. (solid angle, boundary element meth..., helmholtz integral eq...)

hie2dcyl.m

Sound Level Meter by Douglas Lanman

Implements real-time spectrum analyzer and displays decibel level. (sound, sound level meter, decibel meter)

SLM

analyzeSignal(x,Fs)

estimateLevel(x,Fs,C)

Tools for Data Analysis in Optics, Acoustics, Signal Processing by Valerio Lucarini

A simple software package for sophisticated data analysis for optics, acoustics, signal processing (physics, optics, acoustics)

[refin,imfin]=selfconscam(omega,rechi,imchi,iter,w)

imchi=kkimbook2(omega,rechi,alpha)

imchi=sskkimbook2(omega,rechi,omega1,imchi1)

octave by Christophe COUVREUR

Generates normalized A-weigthing, -weighting, octave and one-third-octave digital filters. (acoustics, normalized, filter analysis)

adsgn(Fs);

aspec(B,A,Fs);

bankdisp(P,F,Pmin,Pmax);