AR 324-ARCH32S1 | Building Utilities 3: Acoustics Background
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Questions and Answers

What is the main focus of the science of acoustics?

  • The production of sound waves
  • The transmission of sound waves
  • Securing distinct conditions in buildings and rooms (correct)
  • The absorption of sound waves

    • Which type of acoustics deals with the reaction of human beings to audible sound?

  • Environmental Acoustics
  • Electro Acoustics
  • Psycho Acoustics (correct)
  • Sonics

    • What is the primary focus of environmental acoustics?

  • Generation of audible sound waves
  • Effects of the environment upon audible sound waves (correct)
  • Technical application of mechanical waves
  • Detection of audible sound waves

    • Which type of acoustics deals with noise control in man-made surroundings?

    <p>Environmental Acoustics</p> Signup and view all the answers

    What does electro acoustics primarily focus on?

    <p>Generation and detection of audible sound waves</p> Signup and view all the answers

    What does sonics deal with?

    <p>Technical application of mechanical waves</p> Signup and view all the answers

    What is the threshold of audibility?

    <p>The minimum intensity that is capable of evoking an auditory sensation in the ear.</p> Signup and view all the answers

    What is the unit of frequency?

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

    What does the term 'loudness' refer to?

    <p>The subjective attribute of an auditory sensation.</p> Signup and view all the answers

    What does pitch refer to in the context of sound?

    <p>The attribute of an auditory system which enables us to pinpoint sounds on a scale extending from high to low frequency.</p> Signup and view all the answers

    How is intensity measured in a medium?

    <p>In decibels</p> Signup and view all the answers

    What do high frequency sounds exhibit with respect to their radiation pattern?

    <p>They are more pronounced along the longitudinal axis of the sound source.</p> Signup and view all the answers

    What does the term 'wavelength' refer to in the context of sound?

    <p>The distance a sound wave travels during each complete cycle of vibration measured in meters or feet.</p> Signup and view all the answers

    What are the natural elements that can affect sound?

    <p>Temperature, clouds, wind, bodies of water</p> Signup and view all the answers

    What is sound pressure?

    <p>The fluctuation in the atmospheric pressure caused by the vibration of air particles due to a sound wave.</p> Signup and view all the answers

    What is speed with respect to sound?

    <p>The rate at which sound energy is being transmitted, measured at any point in the medium.</p> Signup and view all the answers

    Study Notes

    Focus of Acoustics

    • Acoustics is the branch of physics concerned with the study of sound, its production, transmission, and effects.

    Human Reaction to Sound

    • Psychoacoustics is the field that examines human responses to audible sound, including perception and cognition of sound.

    Environmental Acoustics

    • Environmental acoustics focuses on sound in natural and built environments, including noise pollution and its effects on people and wildlife.

    Noise Control in Man-Made Surroundings

    • Architectural acoustics addresses the management of sound in built environments, aiming to minimize unwanted noise and enhance desirable sound characteristics.

    Electroacoustics

    • Electroacoustics involves the study of sound reproduction and transmission through electronic means, focusing on devices like microphones and loudspeakers.

    Sonics

    • Sonics pertains to the behavior and characteristics of sound waves, exploring their properties and interactions in various mediums.

    Threshold of Audibility

    • The threshold of audibility refers to the lowest sound level that the average human ear can perceive, typically measured at around 0 dB.

    Unit of Frequency

    • Frequency is measured in Hertz (Hz), representing the number of cycles of sound waves per second.

    Loudness

    • Loudness is the perceptual response to the intensity of sound, influenced by the sound’s amplitude and frequency.

    Pitch

    • Pitch refers to the perceived frequency of a sound, determining how high or low a tone is, which is closely linked to sound wave frequency.

    Intensity Measurement

    • Sound intensity is measured in Watts per square meter (W/m²), indicating the power of sound waves passing through a given area.

    High Frequency Sounds

    • High frequency sounds typically exhibit more directional radiation patterns, concentrating sound energy in a narrow beam compared to lower frequencies.

    Wavelength

    • Wavelength is the distance between successive peaks or troughs of a sound wave, inversely related to frequency; higher frequencies have shorter wavelengths.

    Natural Elements Affecting Sound

    • Natural elements like temperature, humidity, wind, and obstacles can significantly influence the propagation and perception of sound.

    Sound Pressure

    • Sound pressure is the local pressure variation from the ambient atmospheric pressure caused by a sound wave, measured in Pascals (Pa).

    Speed of Sound

    • The speed of sound refers to how quickly sound waves travel through a medium, typically measured in meters per second (m/s), and varies with temperature and medium density.

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    Description

    Test your knowledge on the background and components of acoustics, including the science of sound phenomena, production, transmission, absorption of sound, and environmental technology on sound and noise control in man-made surroundings.

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