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2. Download, install, or uninstall AOL Desktop Gold

   help.aol.com/articles/aol-desktop-downloading...

   1. Search your inbox for the subject line 'Get Started with AOL Desktop Gold'. 2. Open the email. 3. Click Download AOL Desktop Gold or Update Now. 4. Navigate to your Downloads folder and click Save. 5. Follow the installation steps listed below.

3. Reference tone - Wikipedia

   en.wikipedia.org/wiki/Reference_tone

   In telecommunication, a standard test tone is a pure tone with a standardized level generally used for level alignment of single links and of links in tandem. [1]For standardized test signal levels and frequencies, see MIL-STD-188-100 for United States Department of Defense (DOD) use, and the Code of Federal Regulations Title 47, part 68 for other Government agencies.

4. Call-progress tone - Wikipedia

   en.wikipedia.org/wiki/Call-progress_tone

   Tone cadence Dial tone A: 425 Hz: continuous Dial tone B: 425 Hz, amplitude modulated by 25 Hz: continuous Dial tone C: 400 Hz + 425 Hz + 450 Hz: continuous Dial tone D: 400 Hz + 425 Hz: continuous Dial tone E: 413 Hz + 438 Hz: continuous Ringback tone A: 425 Hz, amplitude modulated by 25 Hz: 0.4 s on, 0.2 s off, 0.4 s on, 2 s off Ringback tone ...

5. Beat (acoustics) - Wikipedia

   en.wikipedia.org/wiki/Beat_(acoustics)

   For example, if a 530 Hz pure tone is presented to a subject's right ear, while a 520 Hz pure tone is presented to the subject's left ear, the listener will hear beating at a rate of 10 Hz, just as if the two tones were presented monaurally, but the beating will have an element of lateral motion as well.

6. Programmable sound generator - Wikipedia

   en.wikipedia.org/wiki/Programmable_sound_generator

   A programmable sound generator (PSG) is a sound chip that generates (or synthesizes) audio wave signals built from one or more basic waveforms, and often some kind of noise. PSGs use a relatively simple method of creating sound compared to other methods such as frequency modulation synthesis or pulse-code modulation .

7. Fire alarm notification appliance - Wikipedia

   en.wikipedia.org/wiki/Fire_alarm_notification...

   95 dB @ 3,100 Hz tone are used in many current notification devices. [1] 80 dB @ 520 Hz tone are used in newer notification devices. [1] 70 dB to 100 dB weighted for human hearing (higher decibels, in the 100 to 115 dB range, were common with older electromechanical horns) [citation needed] Light (visible signals) 15 cd to 1,000 cd candela ...

8. Continuous Tone-Coded Squelch System - Wikipedia

   en.wikipedia.org/wiki/Continuous_Tone-Coded...

   The most common set of supported tones is a set of 39 tones including all tones with Motorola PL codes, except for the tones 8Z, 9Z, and 0Z (zero-Z). [6] The lowest series has adjacent tones that are roughly in the harmonic ratio of 2 0.05 to 1 (≈1.035265), while the other two series have adjacent tones roughly in the ratio of 10 0.015 to 1 ...

9. AOL Desktop Gold | 30-Day Free* Trial | AOL Products

   www.aol.com/products/browsers/desktop-gold

   Experience AOL Desktop Gold, a faster and more secure way to navigate the online world. Try it free* for 30 days! AOL.com. Products Main Security Identity Tech Support Utilities Bundles.