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path: root/abs/mtx_phon_curve.pd
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#N canvas 537 0 743 796 10;
#X obj 78 35 inlet;
#X obj 422 345 mtx_exp;
#X obj 422 281 mtx_- 3.3;
#X obj 53 553 mtx_+;
#X obj 53 646 outlet;
#X obj 296 284 mtx_.^ -0.8;
#X obj 504 281 mtx_.^ 4;
#X obj 296 390 mtx_* 3.64;
#X obj 422 301 mtx_.^ 2;
#X obj 422 321 mtx_* -0.6;
#X obj 422 375 mtx_* -6.5;
#X obj 422 402 mtx_+;
#X text 94 53 freq;
#X obj 78 104 mtx_* 0.001;
#X obj 504 311 mtx_* 0.001;
#X obj 79 133 t a a a a;
#X obj 53 518 mtx_+;
#X obj 53 448 mtx_* 0;
#X obj 108 447 mtx_* 1;
#X obj 155 355 / 100;
#X obj 182 37 inlet;
#X text 189 59 phon;
#X obj 152 410 expr 1-$f1;
#X obj 53 290 mtx_.^ -0.9;
#X obj 53 388 mtx_* 1.183;
#X obj 232 63 loadbang;
#X obj 182 90 \$1;
#X obj 78 76 mtx_max2 0.1;
#X text 344 135 3.64*f^(-.8) - 6.5* exp(-.6*(f-3.3)^2)+10^(-3)*f^4
;
#X text 343 101 0 phon curve;
#X text 343 118 absolute threshold of hearing;
#X text 153 321 fade between;
#X text 558 252 high freq. skirt;
#X text 404 253 ear channel dip;
#X text 277 250 low freq. skirt;
#X text 307 266 0 phon;
#X text 32 249 low freq. skirt;
#X text 62 265 100 phon;
#X text 362 567 Franz Zoter \, 2007;
#X obj 53 584 mtx_+ 0;
#X obj 155 376 t f f;
#X text 321 85 3 rightmost paths:;
#X text 321 169 1 leftmost path: lower skirt of 100 phon curve;
#X text 246 30 calculates the contours of equal loudness for an arbitrary
frequency vector/matrix in dB;
#X connect 0 0 27 0;
#X connect 1 0 10 0;
#X connect 2 0 8 0;
#X connect 3 0 39 0;
#X connect 5 0 7 0;
#X connect 6 0 14 0;
#X connect 7 0 18 0;
#X connect 8 0 9 0;
#X connect 9 0 1 0;
#X connect 10 0 11 0;
#X connect 11 0 3 1;
#X connect 13 0 15 0;
#X connect 14 0 11 1;
#X connect 15 0 23 0;
#X connect 15 1 5 0;
#X connect 15 2 2 0;
#X connect 15 3 6 0;
#X connect 16 0 3 0;
#X connect 17 0 16 0;
#X connect 18 0 16 1;
#X connect 19 0 40 0;
#X connect 20 0 26 0;
#X connect 22 0 18 1;
#X connect 23 0 24 0;
#X connect 24 0 17 0;
#X connect 25 0 26 0;
#X connect 26 0 19 0;
#X connect 26 0 39 1;
#X connect 27 0 13 0;
#X connect 39 0 4 0;
#X connect 40 0 17 1;
#X connect 40 1 22 0;