Sentence examples for background tone from inspiring English sources
The effects of background tone (BGT) on the waveform of the auditory evoked potentials obtained from nine male students exposed to 95 ms tone bursts were studied at 250 Hz, 500 Hz, 1 kHz, 2kHz and 4 kHz.
To determine a maximum startle response, a startle was also elicited without any background tone (sound off startle).
The background tone therefore appears to alter the response to subsequent more phasic release of DA as originally suggested by Grace [6].
During gASR testing, a background tone of either, 4, 8, 12, 16, 20, or 24 kHz at 45 and 60 dB, (or 75 and 90 dB in post noise exposed animals) was presented.
For the gASR paradigm the data were calculated in the same way except for each trial at each frequency and sound level the maximum startle response was recorded both in the presence of the background tone and in a silent background.
The present results build on these findings by again showing that glutamate is responsible for the generation and maintenance of the Up-states while increases in DA levels over the background tone tend to reduce the Up-state once it is evoked.
Two hundred auditory stimuli (bursts) were presented to the ears through earphones, with an intensity of 60 dB above the hearing threshold; 80% of tones were 2 kHz in frequency (background tones), whereas the remaining 20% were 8 kHz (target tones).
His concern is reflected in the darkened flesh and background tones of his paintings from this period.
Therefore the intensities for the pre-pulse (pASR) and background tones (gASR) were increased to levels that could be detected by the animals (70 and 95 dB).
However, inhibition of the acoustic startle reflex was less variable at 60 dB when compared to 45 dB (data not shown) suggesting that the higher intensity pre-pulse or background tones increased ASR sensitivity when comparing performance across frequencies.
In contrast to other studies of this kind, there are no protective spectral regions where the background tones are omitted.
