STIMULUS RECORDING

What is the key characteristic of chirp stimuli in auditory evoked potential measurements?

• A) Chirps are a series of discrete clicks presented in sequence.

• B) Chirp stimuli are designed to compensate for frequency-dependent traveling-time differences across the cochlea.

• C) Chirps are only used in cortical evoked responses.

• D) Chirp stimuli have a very narrow frequency range.

what does the term "spectral splatter" refer to?

• A) The concentration of energy at a specific frequency.

• B) The broadening of the frequency spectrum caused by the short duration of the stimulus.

• C) The clarity of the signal's main frequency.

• D) The reduction in amplitude due to prolonged stimulus duration.

These systems have a unit for presentation of stimulus called the __________ and a unit for recording auditory evoked potentials called the __________.

In __________ polarity, a positive electrical pulse causes the transducer diaphragm to move outward toward the tympanic membrane, generating a positive pressure. In __________ polarity, the transducer diaphragm moves inward and away from the tympanic membrane, producing a negative pressure wave.

What happens when the stimulus rate is increased during auditory evoked potential measurement?

• A) Latency decreases equally for all waves.

• B) Latency increases for all waves, but the interwave interval (I–V delay) remains unaffected.

• C) Latency increases, with later waves (e.g., Wave V) being more affected than earlier waves (e.g., Wave I), leading to a longer interwave interval (I–V delay).

• D) Latency decreases, and later waves are less affected than earlier waves.

Why is the rise and fall time important in tone burst stimuli?

• A) It affects the frequency of the stimulus

• B) Short rise/fall times result in spectral splatter

• C) It determines the loudness of the tone burst

• D) Longer rise/fall times lead to higher ABR amplitudes

In the paired click stimulus paradigm, what occurs when the second click is presented during the refractory period?

• A) It generates an action potential in the auditory nerve fibers

• B) It produces excitatory postsynaptic potentials (EPSPs)

• C) It results in a complete cancellation of the first click's response

• D) It causes immediate firing of the auditory nerve fibers

What is the primary difference between a 'click' stimulus and a 'plop' stimulus?

• A) The 'plop' lacks the ringing and added frequency components of the click

• B) The 'click' has more energy in the high-frequency regions

• C) The 'plop' has a longer duration than the click

• D) The 'click' lacks any frequency components

Which of the following is true about the temporal dispersion observed with click stimuli?

• A) Temporal dispersion increases as the wave moves toward the base of the cochlea

• B) Temporal dispersion causes synchronization across all regions of the cochlea

• C) Temporal dispersion increases as the traveling wave moves apically

• D) Temporal dispersion is absent in the cochlea

What are chimeras in auditory research?

• A) Stimuli formed by adding noise to a pure tone

• B) Stimuli formed by combining the envelope of one stimulus with the fine structure of another

• C) High-intensity broadband noises used for masking

• D) Low-frequency sounds generated to evoke ABRs