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M. Morinaga

Bio: M. Morinaga is an academic researcher from Osaka University. The author has contributed to research in topics: Sleep in non-human animals & Thesaurus (information retrieval). The author has an hindex of 2, co-authored 3 publications receiving 32 citations.

Papers
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01 Jan 2004
TL;DR: The results show that an influence of the color to the perception of loudness for most subjects does exist while the averaged effect over all subjects is small and an experiment with the semantic differential can explain the different favour of German and Japanese subjects for the most quiet sound.
Abstract: In this study, the evaluation of audio-visual interaction regarding to the sounds and colours of trains was investigated. Different pictures of trains were modified in their colors and presented on a liquid crystal screen in a sound proof room with the appropriate sound of the train. The subjects judged the loudness of the sound-picture stimuli with the method “ free magnitude estimation” . At first, a previous study with German subjects and German trains was repeated under the same conditions with Japanese subjects. Furthermore different experiments with more Japanese trains were performed. To conclude differences between Japanese and German subjects in the estimation of loudness, a semantic differential experiment was arranged. The results show that an influence of the color to the perception of loudness for most subjects does exist while the averaged effect over all subjects is small. In addition an experiment with the semantic differential can explain the different favour of German and Japanese subjects for the most quiet sound.

18 citations

Journal ArticleDOI
TL;DR: In this paper, the effort to fall asleep was used as an index of sleep and the effect of various physical properties of sounds was examined, where subjects were asked to try to sleep listening to sounds presented with a mini-disk and they were allowed to switch off the sound after 1 h if they could not sleep.

15 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors conduct a review of the evidence surrounding the optimal characteristics for the sleep environment in the categories of noise, temperature, lighting, and air quality in order to provide specific recommendations for each of these components.

77 citations

Journal ArticleDOI
TL;DR: This article reviews the literature about the effects of specific non-traffic-related ambient noise sources on sleep that appeared in the last two decades and indicates that ambient noise has some effect on human sleep.
Abstract: This article reviews the literature about the effects of specific non-traffic-related ambient noise sources on sleep that appeared in the last two decades. Although everybody is faced with noise of non-traffic and non-industry origin (e.g. sounds made by neighbors, talk, laughter, music, slamming doors, structural equipment, ventilation, heat pumps, noise from animals, barking dogs, outdoor events etc.), little scientific knowledge exists about its effects on sleep. The findings of the present extensive literature search and review are as follows: Only a small number of surveys, laboratory and field studies about mainly neighborhood, leisure and animal noise have been carried out. Most of them indicate that ambient noise has some effect on human sleep. However, a quantitative meta-analysis and comparison is not possible due to the small number of studies available and at times large differences in quality.

49 citations

Journal ArticleDOI
TL;DR: Investigation of the effect of images of differently colored sports cars on the loudness of a simultaneously perceived car sound suggests that the color of the visual stimulus may have a small influence on loudness judgments.
Abstract: This experiment investigates the effect of images of differently colored sports cars on the loudness of a simultaneously perceived car sound. Still images of a sports car, colored in red, light green, blue, and dark green, were displayed to subjects during a magnitude estimation task. The sound of an accelerating sports car was used as a stimulus. Statistical analysis suggests that the color of the visual stimulus may have a small influence on loudness judgments. The observed loudness differences are generally equivalent to a change in sound level of about 1 dB, with maximum individual differences of up to 3 dB.

46 citations

Journal ArticleDOI
TL;DR: It is demonstrated that chronic exposure to noise indirectly disturbs LTM possibly through SWS disturbances and a possible role of the stress hormonal axis in these biological effects of noise is suggested.

42 citations

Journal ArticleDOI
TL;DR: The validity and suitability of a rodent model for studying the effects of noise on sleep and definitively show that sleep is disturbed by EN exposure are demonstrated.

38 citations