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

purchase accutane rogaine shampoo info about generic tretinoin azithromycin over the counter http://moblico.com/lipitor-india/ info about modalert sale buy modafinil provigil modalert information about no prescription modapro modalert modafinil cheapest norvasc online http://moblico.com/nexium-online-order/ azithromycin 200 5 ml bactrim ds bid baclofen 10 mg pelosta finasteride naltrexone 50mg bupropion hcl 150mg xl 141 nexium prices information buy aldactone online cheap femara in united states canada premarin prices generic sirolimus available buy silagra online in india bupropion sr pills in canada clomid clomiphene citrate buy generic zyban online in new york ranitidine 75 mg viraday usa ciprofloxacin 500mg prednisolone canada fluconazole 200 mg in france avanafil stendra in india http://www.fitnessformula.it/buy-modafinil-usa/ modvigil about bupron buy xenical 120 mg online silagra tadacip prilosec otc generic norvasc 10 mg tablet in uk buying clomiphene citrate in new york accutane price in india more info 25mg norvasc 10mg amitriptyline hcl baclofen tab 5 mg more info buy viraday usa buy fluconazole online cheap metronidazole metronidazole tablets 200mg omeprazole tablets price lipitor 10mg information about generic for baclofen dilantin 250 mcg cost for generic prilosec in canada cost of gleevec buy lasuna online quinine sulphate 200mg simvastatin 10 mg in france norvasc prices in new york fluconazole tablets