Test your basic knowledge |

Digital Audio

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Contains all even and odd harmonics associated with a fundamental tone - making it a rich source for modeling other sounds; Amplitude of each overtone decreases exponentially as a ratio of the harmonic's frequency to that of the fundamental






2. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution






3. Have odd numbered harmonics






4. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm






5. Same as 'aliasing'






6. Difference in brightness between land and pit on a CD Physical Format






7. A sample- by- sample operation on two signals






8. Multi-Bit Words; (Pulse Code Modulation)






9. Method used in digital recording and reproduction in which a signal is sampled at various points and the resulting value is translated into binary numbers






10. A digital filter's time domain output sequence when the input is a single sample is input






11. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form






12. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)






13. 12.33 GB; DS/ML






14. Softest sound that can be heard by the average human ear (0 dB)






15. 'Reconstructing' part of digital audio






16. Apple Lossless; Windows Media Lossless; DTS HD Master Audio; Dolby True HD; FLAC






17. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution






18. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics






19. Splits the input signal and mixes it with an analog copy so that no latency is present






20. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound






21. Process of building a complex tone by starting with the fundamental frequency and adding pure tone harmonics






22. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby






23. A network communications protocol that specifies how machines will exchange data; Uses a broadcast system in which one machine transmits its message on the communication medium and the other machines listen for messages directed to them






24. 7.95 GB; SS/DL






25. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience






26. A method of representing real numbers using a mantissa and an exponent






27. As sample rate is increased more room is created for a smoother slope of the attenuation band because Nyquist limit extends well beyond range of hearing with each increase






28. Sample Rate x Bit Depth x # of Channels






29. Fractional part of a floating- point number; Also called the mantissa; Defines precision






30. Signal voltage is relayed to a register from sample- and - hold circuit; Holds reference frequencies in binary form that decrease in value; Finds approximated value & assigns binary number accordingly






31. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude






32. Level above which audible sounds are painful (125 - 130 db)






33. EBU






34. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated






35. The continuous loss of signal strengths as a signal travels through a medium






36. Computer program or device capable of encoding and/or decoding a digital data stream with the end result being a reduced file size






37. Subtract place values from the decimal number and place ones or zeros in the correct places






38. Branch of psychology concerned with the subjective perception of sound






39. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3






40. Improper (false) sampling of high frequencies that cause much lower frequencies to be produced when the audio is reconstructed; Foldover happens at higher frequencies as harmonics reach levels that exceed the Nyquist limit.






41. Algorithm uses matrix of a mid/side microphone pair to determine a side signal & that signal is reduced then distributed as code in stereo






42. 4.38 GB; SS/SL






43. The difference in volume between the loudest and quietest sounds of a source






44. Very quiet digital amplifier that produces a series of output pulses with the audio signal coded the same as the width of the output pulses; Pulses are used to represent wave forms and are either on or off; Intense signals have long pulses with short






45. Removes high frequency images and noise and smoothes the stair case output coming from of the sample and hold circuit; Also called a SMOOTHING FILTER






46. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode






47. Eight channel digital surround sound system by Dolby






48. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission






49. Cable used to transmit data; Inner cable is surrounded by a plastic insulator - which is surrounded by a wire mesh conductor that insulates the internal signal wire from external interference and an outer casing that functions as a ground






50. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values