A Study of Engine Intake Noise Control Based on the Improved Filtered-x Least Mean Square Algorithm

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left">Engine speed ( <span class="nowrap"><svg height="8.8423pt" id="M146" style="vertical-align:-0.2064009pt" version="1.1" viewbox="-0.0498162 -8.6359 28.6633 8.8423" width="28.6633pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M610 18C585 26 567 34 540 68C517 97 499 128 476 171C452 215 425 276 413 304C496 332 570 394 570 494C570 555 545 595 509 619S419 650 364 650H139L133 622C216 615 219 612 203 527L129 132C112 40 105 36 23 28L17 0H279L285 28C199 34 194 40 211 132L239 284H284C320 284 334 275 351 236C374 182 394 140 420 93C459 23 495 -1 592 -8H600L610 18ZM480 485C480 424 449 372 403 342C374 323 338 316 293 316H245L291 562C296 589 301 601 311 608S337 618 358 618C432 618 480 575 480 485Z"></path></g><g transform="matrix(.013,0,0,-0.013,8.151,0)"><path d="M600 480C600 590 528 650 384 650H143L137 622C222 614 225 607 210 531L130 127C113 41 106 36 23 28L17 0H294L300 28C204 36 195 42 212 127L243 284L314 263C327 263 339 263 352 264C465 271 600 337 600 480ZM508 481C508 351 402 304 329 304C289 304 265 311 250 317L295 559C302 594 310 606 323 611C335 616 350 619 367 619C455 619 508 573 508 481Z"></path></g><g transform="matrix(.013,0,0,-0.013,15.655,0)"><path d="M962 650H795L470 145L347 650H176L170 622C268 613 275 606 244 503L190 322C150 188 132 126 118 91C102 50 80 33 18 28L12 0H245L251 28C175 35 170 48 174 93C177 128 191 180 220 284L292 542H294C331 392 383 150 409 4H432L774 555H776L714 137C700 40 694 34 612 28L606 0H868L874 28C793 34 784 37 797 137L849 533C859 612 863 616 956 622L962 650Z"></path></g></svg>)</span></td><td class="align_center">1800</td><td class="align_center">2400</td><td class="align_center">3000</td><td class="align_center">3600</td><td class="align_center">4200</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">Vehicle speed (km/h)</td><td class="align_center">61.3</td><td class="align_center">81.7</td><td class="align_center">102.1</td><td class="align_center">122.5</td><td class="align_center">142.9</td></tr><tr><td class="align_left">Noise fundamental frequency (Hz)</td><td class="align_center">60</td><td class="align_center">80</td><td class="align_center">100</td><td class="align_center">120</td><td class="align_center">140</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Corresponding relationship of rotational speed and vehicle speed.</div>

Shock and Vibration

tab2

Table 2

Table 2: A Study of Engine Intake Noise Control Based on the Improved Filtered-x Least Mean Square Algorithm 