Beating

Disciplines of Study [DoS]  >  Acoustics  ]

Beats are a form of amplitude modulation. As two frequencies are brought closer together, the beats will gradually slow down and disappear when they become identical. If two tones are about 15 Hertz or less apart, interference will result from their similar though not exactly identical frequencies. Gradually they will move out of phase until at 180 destructive interference results, producing diminished loudness. When they move back into phase, constructive interference will produce increased loudness. Beats arising from the mistuned unison are called first-order beats, and are both an acoustic and psychoacoustic phenomenon. Beats also may be heard between pure tones that are nearly an octave, fifth or fourth apart. These are called secondary or second-order beats. (Source: Barry Truax - Handbook for Acoustic Ecology CD-ROM Edition. Cambridge Street Publishing, 1999 - CSR-CDR 9901)

 

See also:

Modulation

 

Bibliography:

English - Español - Français - Deutch - Italiano

Alphabetical order - Chronological order

Top

more info drug budeprion malegra dxt 130mg bactrim suspension naltrexone without prescription information buy memantine er buy amlodac without a prescription http://www.actuabd.com/?order=924320 fluconazole no prescription levitra 20mg more info about buy qutipin usa generic dapoxetine about prilosec online pharmacy http://www.actuabd.com/?order=271567 diflucan price more info about buy iressa in india atomoxetine buy no prescription fluticasone 250 50 28 information erlotinib drug femara sun information about esomeprazole tablet bimatoprost buy canada buy doxycycline hycl in india more omeprazole buy ciprofloxacin cipro buy gleevec usa in india purchase piracetam femalegra 100 info about flagyl 4000 mg buy tadalafil 270 online lasix in georgia terbicip ciplactin for http://www.actuabd.com/?order=924003 more omeprazole pills online omeprazole fluticasone propionate cheap cheap zocor in mexico buy nizonide online in usa buy pletoz usa ciprofloxacin africa buy diflucan on line buy gleevec 400mg discounts for nexium buy azithromycin overnight mail buy oracea canada in california information about diflucan over the counter http://www.actuabd.com/?order=28472 cheap zocor online http://www.actuabd.com/?order=385185 more info about buy super kamagra more info about generic enalapril buy tenofovir gel online http://www.actuabd.com/?order=169233 more info about buy cheap biduret waklert uk buy silagra 100 mg http://www.actuabd.com/?order=104962 nizonide for sale in canada info about buy cheapest acamprol lipitor 40mg bimatoprost for sale http://www.actuabd.com/?order=337389 buy ciprofloxacin eye drops in new york