Auditory demonstrations on compact disk for large N.

W M Hartmann

doi:10.1121/1.405645

Home/Archive/PubMed

PubMed · 8423255

Auditory demonstrations on compact disk for large N.

W M Hartmann

View original source ↗Export metadata ↓

Abstract

The popular compact disk entitled Auditory Demonstrations, sponsored by the Acoustical Society of America, includes a number of demonstrations that lead to quantitative results. Those demonstrations are evaluated here in the context of a sizeable class in a lecture room. Demonstrations concern masking, loudness, and pitch; specifically they are numbers 2, 3, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 20, and 25. The evaluations find that most of the demonstrations successfully illustrate psychoacoustical principles in a classroom context; others are less successful or require special circumstances for success. Explanations for success and failure are offered, together with some suggestions for optimizing the chances of success.

Explore related subjects

Acoustic Stimulation Auditory Perception Auditory Threshold Female Hearing Humans Loudness Perception Male Noise Perceptual Masking Pitch Perception Psychoacoustics Journal Article Research Support, U.S. Gov't, P.H.S.

Keep this discovery

Explore connections, maps & timelines

BibTeX RIS

W M Hartmann. 1993. Auditory demonstrations on compact disk for large N.. https://doi.org/10.1121/1.405645

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2002

Neural substrates of animal mental imagery: calcarine sulcus and dorsal pathway involvement--an fMRI study.

Neural response was measured using fMRI in six healthy volunteers, performing a mental imagery task, using verbal cues exclusively. They listened to a list of animal names from which to generate a mental image, and listened passively to a list of abstract words. They were tested twice, using the same protocol. SPM99-processed results showed for both sessions activation in the calcarine sulcus and local activation foci, mainly in the occipito-parietal region. Other studies involving figurative mental imagery using verbal cues, have shown activation in the occipito-temporal area, but none in the calcarine sulcus or in the dorsal route. We account for the discrepancies relative to previous mental imagery studies using verbal cues, in terms of differences in the experimental conditions. In our opinion, restricting the stimuli to a single semantic category (animals) and increasing the time dedicated to the production of MI, may have enhanced the components of the pictures. This mental imagery generation protocol shows the importance of the design of experimental tasks on anatomo-functional responses.

Acoustic Stimulation↗

PubMed2002

Effects of waking-auditory stimulation on human sleep architecture.

Evidence suggests that sleep architecture is affected by endogenous homeostatic mechanisms as well as by behavioral and sensory demands during the prior wakefulness. Regarding the auditory system, sensory deprivation has shown to drastically modify the sleep structure, stressing the relevance of such sensory system for sleep organization. Changes in sleep architecture following prolonged auditory stimulation during prior wakefulness would provide additional support to this hypothesis. In the present study, auditory stimulation was administered over a 6 h period prior to sleep. Sleep parameters obtained from visual scoring were quantified across the total sleep period, for each sleep cycle, and for the two halves of the night, separately. Results showed that 6 h of waking-auditory stimulation were followed by an increase in the duration of slow wave sleep, a shortening of the latency between slow wave sleep periods, and a longer sleep onset latency as compared with the baseline night. In contrast, REM sleep parameters were unaffected by the pre-sleep auditory stimulation. These results indicate that sleep architecture depends on auditory demands during the prior wakefulness, suggesting that the local neural activation underlying auditory stimulation may trigger brain control mechanisms selectively involved in both the slow wave sleep maintenance and organization.

Acoustic Stimulation↗

PubMed2002

Histaminergic neurons of the ventral hippocampus and the baso-lateral amygdala of the rat: functional interaction on memory and learning mechanisms.

The possibility of a functional interaction between the amygdala and the ventral hippocampus on learning of a conditioned avoidance response when both brain structures are chemically stimulated with histamine was studied in rats. Adult male rats were stereotaxically implanted under ether anaesthesia with guide cannulae into the baso-lateral amygdala and the ventral hippocampus. Seventy-two hours after the implant, rats were microinjected with: 1 microl saline solution into both structures (SAL+SAL group); 9 or 90 nmol doses of histamine into both structures (HA+HA groups); 9 or 90 nmol histamine into the hippocampus and saline into the amygdala (HA+SAL groups); saline into the hippocampus and 9 or 90 nmol histamine into the amygdala (SAL+HA groups). Five minutes following the injection, rats were subjected to a learning task in eight consecutive trials, consisting of avoiding an electric shock applied to the feet of the animal when an ultrasonic tone of 40 kHz is on for 30 s. Results show that histamine applied in any dose into both amygdala and hippocampus was able to significantly increase the escape latency and impair the efficacy of learning. Chemical stimulation with histamine of only hippocampus or amygdala affected selectively the escape latency. Results suggest that there is a functional interaction between histamine-sensitive neurons of the amygdala and hippocampus during processing of a learning task.

Acoustic Stimulation↗