Digital waveforms

To save on space and transmission bandwidth, telephones and other systems frequently use 8 bits (48db) and 12 bits (72db). At 8 bits, speech quality is noticeably worse than at 16 bits. 12 bits is a reasonable compromise, but if space is not an issue (and with most types of speech s3mthesis it is not), 16 bits is normally used. 

---

Since many digital waveforms are periodic, a GOTO statement is provided for looping. The attributes in Table 8-3 and shown in the screen capture produce a clock frequency of 1 kHz for four cycles and then 500 Hz for an infinite number of cycles ... 

Hartmann, 1987] Hartmann, W. M. (1987). Digital waveform generation by fractional addressing. J. Acoustical Society of America, 82(6) 1883—1891. 

Digital ion trap 64,85 Digital waveform 65 Double-focusing mass analyzers 47 Double-focusing mass spectrometers 50 Dried droplet method 39 Droplet radius 18... 

Multiple-frequency resonance ejection methods have been developed to eject specifically one or more ion species simultaneously. Digital waveform generators have been used for this purpose and have been shown to provide greater control over the excitation processes [7]. Most of these methods are derived from ICR mass spectrometry. 

The discrete-time Fourier transform converts a digital waveform into a continuous spectrum ... 

Pressures were measured at several locations with piezoelectric transducers and stored in digital waveform recorders. Measurements were obtained for up to 12 cycles of shock reflection. 

Every DAQ system has the task of gathering information about analog signals. To do this, the system captures a series of instantaneous snapshots or samples of the signal at definite time intervals. Each sample contains information about the signal at a specific instant. Knowing the exact conversion time and the value of the sample, you can reconstruct, analyze, and display the digitized waveform. 

LabVIEW provides several graphs and charts to display data. They are waveform graphs, waveform charts, XY graphs, intensity graphs intensity charts, digital waveform graphs. 

A digitized waveform is just a series of amplitude measurements, so waveform inversion may be regarded as an extension of amplitude inversion. 

---