The pitch of a sound is defined by the . . . amplitude volume bit-depth frequency d The volume of a sound is defined by the . . . amplitude aliasing bit-depth frequency a The three bones in the ear are called what? faceplate eardrum ossicles cochlear c The cochlear contains what? air fluid b The cochlear acts as . . . a resistor an impedance matcher a protection an amplifier d In what frequency band does the human ear work? 20Hz to 20KHz 20KHz to 200KHz 20Hz to 200KHz below 20Hz a What is the dynamic range of human hearing? below 20Hz 20Hz to 200KHz 20KHz to 200KHz 20Hz to 20KHz d How many decibels is a rock band? 13 31 130 1300 c How many decibels is a jet airliner at take-off? 300 150 100 50 b The dynamic range gradient is linear. true false b Jo Average can sing in a range of . . . 2 octaves 8 octaves 20Hz to 20KHz 20Hz to 200KHz a Timbre is . . . frequency pitch attenuation distinctive character d Timbre is produced by . . . the fundamental note frequency harmonics amplitude c To capture the character of a voice you must . . . record the fundamental record the low frequencies record in the mid range record the harmonics d A guitar makes a pure sine wave true false b Telephone quality (11,025) is . . . OK for recording the guitar not OK for recording the guitar OK for recording a singer OK for recording a piano b Telephone quality is . . . 8000Hz 8-bit 11,025Hz 8-bit 22,050Hz 8-bit 44,100Hz 16-bit b Radio quality is . . . 8000Hz 8-bit 11,025Hz 8-bit 22,050Hz 8-bit 44,100Hz 16-bit c CD quality is . . . 8000Hz 8-bit 11,025Hz 8-bit 22,050Hz 8-bit 44,100Hz 16-bit d Which bit-depth inherently generates more noise? 8-bit 16-bit 24-bit 32-bit a The ear perceives loudness in a different context logarithmic scale linear scale brite acoustic b High frequencies go around corners . . . more easily than low frequencies less easily than low frequencies not at all very easily b Which frequencies fall off most over distance? high frequencies low frequencies a Sub-aural frequencies can travel long distances. true false a How many bits are there in a byte? 2 8 16 24 b Sampling takes place on which axis? voltage time z Nyquist b Quantization takes place on which axis? Nyquist time voltage z c Sampling must be at . . . twice the highest input frequency the highest input frequency half the highest input frequency the lowest input frequency a To record a frequency of 16kHz sample at . . . 8000 11025 22050 44100 d Aliasing is . . . a desirable feature of digitisation a desirable feature of analogue systems an undesirable feature caused by under-sampling an undesirable feature caused by over-sampling c Anti-aliasing is under-sampling over-sampling re-sampling smoothing d A low-pass filter on the input may reduce aliasing increase aliasing reduce amplitude increase amplitude a What is a useful application of aliasing? noise reduction artefact reduction television stroboscope d Quantizing errors at low signal strengths result in noise distortion temporal aliasing anti-aliasing b Quantizing errors at high signal strengths result in temporal aliasing anti-aliasing noise distortion c Which of these binary numbers is 3? 0000 1000 1100 0011 d Which of these binary numbers is 8? 0000 1000 1100 0011 b How many discrete values in an 8-bit file? 8 256 22050 65536 b How many discrete values in a 16-bit file? 8 256 22050 65536 d Decibels are used to measure the . . . amount of data in a sound file volume of a sound pitch of a sound length of a sound b Signal to noise ratio should be . . . high low 16-bit 8-bit a Fidelity means . . . copyright analogue digital quality d Generations of dubs . . . reduce quality in digital systems do not reduce quality in analogue systems do not reduce quality in digital systems improve quality in digital systems c Expand PCM in this context. PC Multimedia PC Media Pulse Code Modulation Pulse Code Manipulation c Expand CODEC Correction Decibels Co-Decoder Coder/Decoder Correction Decrementer c SMPTE is a codec a filter an effects tool a time code d Without QuickTime Flash can import . . . WAV AIFF MP3 AU WAV AIFF MP3 WAV AIFF only WAV only b Which band would you reduce to remove sibilant ess? 50Hz - 90Hz 500Hz - 900Hz 5kHz - 7kHz 16kHz - 20kHz c To remove sibilant ess one uses a . . . low pass filter high pass filter noise gate selective narrowband filter d To remove hiss in silent passages one uses a noise gate graphic equalizer high pass filter low pass filter a