Audio Aspects of Communication
13 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does the Q in equalisation refer to?

  • The total volume level
  • The type of audio file used
  • The bandwidth control of frequencies (correct)
  • The length of the audio track

    • In compression, what does a ratio of 4:1 signify?

  • For every 4dB below the threshold, 1dB is output
  • For every 4dB above the threshold, 1dB is output (correct)
  • For every 4dB above the threshold, 2dB is output
  • For every 4dB below the threshold, no compression occurs

    • What is the purpose of using equalisation in audio production?

  • To amplify the entire track equally
  • To control the loudness of specific frequencies (correct)
  • To modify overall volume levels only
  • To extend the length of audio clips

    • What is meant by 'Attack Time' in a compression context?

    <p>The delay before input signal starts being compressed</p> Signup and view all the answers

    Which definition best describes 'Hard Knee' in compression?

    <p>Compression that abruptly begins once the threshold is crossed</p> Signup and view all the answers

    What is the theoretical range of human hearing in Hertz?

    <p>20Hz - 20,000Hz</p> Signup and view all the answers

    Which sample rate is typically used for CD quality audio?

    <p>44,100Hz</p> Signup and view all the answers

    What is the dynamic range of a 16-bit recording in decibels?

    <p>96 dB</p> Signup and view all the answers

    At what dB level does the threshold of pain occur?

    <p>140 dB</p> Signup and view all the answers

    What is typically the range of sounds that telephones can effectively transmit?

    <p>300 Hz - 3400 Hz</p> Signup and view all the answers

    Which term refers to the loudness level being recorded or the input signal level?

    <p>Gain</p> Signup and view all the answers

    What is the typical target recording level when tracking audio?

    <p>-12 dB</p> Signup and view all the answers

    What does '0 dB' indicate in the context of gain staging?

    <p>Unity Gain</p> Signup and view all the answers

    Study Notes

    Audio Aspects of Communication

    • Frequency: Measured in Hertz (Hz), representing cycles per second.
    • Higher frequency corresponds to a higher pitch.
    • Human Hearing Range: 20Hz to 20,000Hz (20kHz).
    • Sample Rate: Example CD quality: 44.1 kHz (44,100 Hz).
    • Frequency Range and Descriptions:
    • Infrasonic: Frequencies below 20Hz
    • Sonic: Frequencies between 20Hz and 20kHz
    • Ultrasonic: Frequencies between 20kHz and 1 GHz
    • Hypersonic: Frequencies above 1 GHz
    • Hearing Capability (Just for Fun):
    • Humans: 20 Hz to 20,000 Hz
    • Dogs: 50 Hz to 45,000 Hz
    • Cats: 45 Hz to 85,000 Hz
    • Elephants: 1 Hz to 200,000 Hz
    • Sound Frequency Examples:
    • Vowel Sounds (like short "O"): 250-1000 Hz
    • Consonant Sounds (like "S"): 1500-6000 Hz
    • Important Sounds: 250 - 6000 Hz
    • Normal Hearing: 20-20,000 Hz
    • Human Voice Range: Approximately 80 Hz to 4000 Hz, with fundamentals ranging lower (males 80-180Hz, females 165-255Hz).
    • Telephone Sample Rate: Typically 8000 Hz, with a range from 300 Hz to 3400 Hz. Sample rate is usually double (or more) the range of sounds being recorded
    • Decibels (dB): Measuring sound wave amplitude, where higher amplitude means louder volume. Dynamic range expressed in decibels.
    • 0 dB: Threshold of human hearing (sounds below this cannot be heard)
    • 16-Bit Recording: Dynamic range of 96 dB
    • 24-Bit Recording: Dynamic range of 144 dB
    • Dynamic Range: The difference between the lowest and highest sounds in a recording
    • 120-140 dB: Threshold of pain, highest theoretical range of Human Hearing (in terms of Dynamic Range)
    • Gain Staging is used for recording.
    • 0 dB = Unity Gain.
    • Mixing our tracks
    • Volume Fader

    Types of Audio Input/Output Devices

    • Microphone Polar Patterns: Omnidirectional, Bi-directional (Figure of 8), Subcardioid, Cardioid, Hypercardioid, Supercardioid, Shotgun

    Audio Processing

    • Equalization (EQ):

    • Parametric EQ: Allows user control of center frequency, bandwidth (Q), and gain.

    • Graphic EQ: User controls the gain for each frequency band.

    • Freq = Frequency in Hz; Gain = Boost + or Cut - in dB; Q = Bandwidth (Higher Q = more precise control, Lower Q = broader control).

    • Compression:

    • Dynamic Range Control.

    • Reducing the difference between loudest and softest sounds in audio.

    • Ratio (e.g., 1:1, 2:1, 4:1, 8:1): How much compression.

    • Threshold: When compressor starts working.

    • Knee: How gradually the compressor engages (Hard Knee vs. Soft Knee).

    • Attack Time: How quickly signal starts being compressed.

    • Release Time: How quickly signal stops being compressed.

    • DAW: Digital Audio Workstation
    • MIDI: Musical Instrument Digital Interface
    • AD/DA (Converters): Analog-to-Digital / Digital-to-Analog
    • A list of recommended YouTube channels for audio topics, with channel names and brief descriptions (e.g., Pensado's Place, ADSR).

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Audio Fundamentals PDF

    Description

    Explore the fascinating world of audio frequencies and their implications on communication. This quiz covers human and animal hearing ranges, sample rates, and the distinctions between infrasonic, sonic, ultrasonic, and hypersonic frequencies. Test your knowledge on how sound interacts with the world around us!

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser