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The effect of amplitude modulation on intelligibility of time-varying sinusoidal speech in children and adults
Perception and Psychophysics; 10/1/2007; Lewis, Dawna E; Carrell, Thomas D; 787 words
; ... this phenomenon in children. Amplitude modulation has been suggested as one ... children's ability to use amplitude modulation (AM) in perception of time-varyi ... benefits (or decrements) from amplitude modulation. Speech perception in natural ...
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Energy levels, phase, and amplitude modulation of the baroclinic tide off Hawaii
Journal of Physical Oceanography; 9/1/2002; Chiswell, Stephen M; 787 words
; ... semidiurnal tide amplitude and phase are modulated ... there is less phase modulation, and amplitude modulation is uncorrelated ... together with phase and amplitude distortion during ... The sense of the amplitude modulation is opposite to that ... variability in the amplitude ...
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Translation Please.(Quadrature amplitude modulation service rendered by cable television broadcasting industry)
Multichannel News; 11/26/2007; Ellis, Leslie; 482 words
; ... quintessentially techie term 'QAM,' for quadrature amplitude modulation, is back in the engineering limelight. This time ... cable services carried over cable plant use QAM modulation. It's the conveyor belt. It's what moves video ...
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A direct 64-QAM modulator suitable for MMIC implementation. (quadrature amplitude modulation; monolithic microwave integrated circuit)
Microwave Journal; 4/1/1997; Kumar, Surinder Mohammadi, Abbas Klymyshyn, David; 787 words
; ... may use lower level modulation with 1 to 1.5 bps/Hz ... migrate to higher level modulation such as 64-quadrature amplitude modulation (QAM) with up to 4 ... realize unipolar pulse amplitude modulation (PAM). The SPDT is ...
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Cisco debuts QAM product for VOD use.(Gear)(quadrature amplitude modulation )(Brief Article)
Multichannel News; 1/19/2004; Stump, Matt; 223 words
; Cisco Systems Inc. is entering the quadrature amplitude modulation market to augment its Gigabit Ethernet business in the cable video-on-demand space. It's the next phase of our digital-video networking ...
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WSNet.(new Quadrature Amplitude Modulation based system)(Brief Article)
Multichannel News; 4/16/2001; 100 words
; AUSTIN, TEXAS -- WSNet has launched a new Quadrature Amplitude Modulation (QAM)-based system that allows multiple-dwelling unit service providers to offer digital programming via existing cable wiring ...
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An International Telecommunications Union study group has, for the first time, adopted worldwide cable transmission standards. (digital television standards employing the '64 quadrature amplitude' modulation)(Brief Article)
Broadcasting & Cable; 7/10/1995; 61 words
; ... has, for the first time, adopted world-wide cable transmission standards. The standards employ the 64 quadrature amplitude modulation (QAM) system for digital TV that was backed by the U.S., Europe and Japan. This is a very important step for the ...
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Circuit provides low-cost QAM mapping and translation.(quadrature-amplitude-modulation)(Brief article)
EDN; 9/27/2007; Small, Charles H Granville, Fran; 265 words
; ... Design Idea presents an efficient way to do QAM (quadrature-amplitude-modulation) mapping and translation into two's-complement values with ... you can split a 256-level QAM signal into a 16-level ASK (amplitude-shift-keying) signal for the in-phase component and a 16-lev ...
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The Tremulous Bear.(product allows creation of amplitude modulation)
Poptronics; 8/1/2001; DANIELS, STEVE; 787 words
; Modulation effects--like tremolos and vibratos--are favorites for ... machine-gun-like repeat percussion. You can set up lots of weird modulations, and you can easily hack the circuit to drive other effects ... intensities, What Is Tremolo And How is It Produced? Tremolo is amplitude ...
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DDS device provides amplitude modulation.(direct-digital-synthesis)(Statistical Data Included)
EDN; 9/2/1999; McCarthy, Mary; 511 words
; ... require an analog output to assume different amplitudes, but many direct-digital-synthesis (DDS) devices do not accommodate amplitude variations. Test equipment uses DDS devices ... signals of different frequencies. However, the amplitude of these signals often must be variable, too ... ready to transmit ... .
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