ASD exam UPDATED ACTUAL Questions
and CORRECT Answers
Audio specifications - CORRECT ANSWER - Frequency response, THD, Noise,
Crosstalk, max output and input level, channel separation, mic input
Driver - CORRECT ANSWER - Produces SPL, highly dependent on enclosure design
Speaker drivers (transducers) - CORRECT ANSWER - Converts electrical energy into
acoustic energy
Issues of loudspeakers - CORRECT ANSWER - Efficiency, frequency response,
distortion, cost, weight
cone driver - CORRECT ANSWER - wire coil in a magnetic field, audio signal passes
through coil, creating magnetic field creating a force that moves the coil, creating sound.
Cone driver issues - CORRECT ANSWER - heavy in assembly, high inefficient, speaker is
always out of phase
enclosure (box) - CORRECT ANSWER - prevents pressure vanes meeting, low frequency
response
Cone deformation - CORRECT ANSWER - air resistance puts force on the cone itself,
causing cone to deform or break. Causes distortion.
Thermal compression - CORRECT ANSWER - a term used to describe the effect on a
loudspeaker of the voice coil heating up during use where it essentially burns out
, Resonance - CORRECT ANSWER - the occurrence of a vibrating object causing another
object to vibrate a higher amplitude
Resonant frequency - CORRECT ANSWER - every physical object has a frequency at
which it will vibrate if stimulated
Compliance - CORRECT ANSWER - Theile and Small, determined by the stiffness
Sensitivity - CORRECT ANSWER - refers to the ability of a microphone to convert sound
waves into an electrical signal, measured in decibels (dB) relative to a standard reference level.
Infinite baffle - CORRECT ANSWER - a large baffle or an enclosure that prevents
interference between sound radiated from the front and back of the speaker cone
Acoustic suspension - CORRECT ANSWER - Air is trapped inside of the enclosure that
allows for a buildup of pressure behind the driver. This trapped air acts like a spring to return the
driver's cone to it's original resting state.
Resonance is determined by; - CORRECT ANSWER - Air volume in box, cone mass and
compliance and sealed box design
Port - CORRECT ANSWER - a design that incorporates a tube or vent that is open to the
outside of the box to allow air to escape. At a high level, a port helps a speaker produce lower
frequencies better.
Bass reflex - CORRECT ANSWER - A loudspeaker cabinet with an opening shaped so
that the enclosure is resonant at low frequencies
Horn loading - CORRECT ANSWER - a technique used in loudspeakers to improve the
efficiency and directivity of sound radiation. A horn acts as an acoustic waveguide, channeling
the sound waves from the driver (speaker) in a specific direction.
and CORRECT Answers
Audio specifications - CORRECT ANSWER - Frequency response, THD, Noise,
Crosstalk, max output and input level, channel separation, mic input
Driver - CORRECT ANSWER - Produces SPL, highly dependent on enclosure design
Speaker drivers (transducers) - CORRECT ANSWER - Converts electrical energy into
acoustic energy
Issues of loudspeakers - CORRECT ANSWER - Efficiency, frequency response,
distortion, cost, weight
cone driver - CORRECT ANSWER - wire coil in a magnetic field, audio signal passes
through coil, creating magnetic field creating a force that moves the coil, creating sound.
Cone driver issues - CORRECT ANSWER - heavy in assembly, high inefficient, speaker is
always out of phase
enclosure (box) - CORRECT ANSWER - prevents pressure vanes meeting, low frequency
response
Cone deformation - CORRECT ANSWER - air resistance puts force on the cone itself,
causing cone to deform or break. Causes distortion.
Thermal compression - CORRECT ANSWER - a term used to describe the effect on a
loudspeaker of the voice coil heating up during use where it essentially burns out
, Resonance - CORRECT ANSWER - the occurrence of a vibrating object causing another
object to vibrate a higher amplitude
Resonant frequency - CORRECT ANSWER - every physical object has a frequency at
which it will vibrate if stimulated
Compliance - CORRECT ANSWER - Theile and Small, determined by the stiffness
Sensitivity - CORRECT ANSWER - refers to the ability of a microphone to convert sound
waves into an electrical signal, measured in decibels (dB) relative to a standard reference level.
Infinite baffle - CORRECT ANSWER - a large baffle or an enclosure that prevents
interference between sound radiated from the front and back of the speaker cone
Acoustic suspension - CORRECT ANSWER - Air is trapped inside of the enclosure that
allows for a buildup of pressure behind the driver. This trapped air acts like a spring to return the
driver's cone to it's original resting state.
Resonance is determined by; - CORRECT ANSWER - Air volume in box, cone mass and
compliance and sealed box design
Port - CORRECT ANSWER - a design that incorporates a tube or vent that is open to the
outside of the box to allow air to escape. At a high level, a port helps a speaker produce lower
frequencies better.
Bass reflex - CORRECT ANSWER - A loudspeaker cabinet with an opening shaped so
that the enclosure is resonant at low frequencies
Horn loading - CORRECT ANSWER - a technique used in loudspeakers to improve the
efficiency and directivity of sound radiation. A horn acts as an acoustic waveguide, channeling
the sound waves from the driver (speaker) in a specific direction.
