The influence of ski helmets on sound perception and sound localisation on the ski slope.
نویسندگان
چکیده
OBJECTIVES The aim of the study was to investigate whether a ski helmet interferes with the sound localization and the time of sound perception in the frontal plane. MATERIAL AND METHODS Twenty-three participants (age 30.7±10.2) were tested on the slope in 2 conditions, with and without wearing the ski helmet, by 6 different spatially distributed sound stimuli per each condition. Each of the subjects had to react when hearing the sound as soon as possible and to signalize the correct side of the sound arrival. RESULTS The results showed a significant difference in the ability to localize the specific ski sounds; 72.5±15.6% of correct answers without a helmet vs. 61.3±16.2% with a helmet (p < 0.01). However, the performance on this test did not depend on whether they were used to wearing a helmet (p = 0.89). In identifying the timing, at which the sound was firstly perceived, the results were also in favor of the subjects not wearing a helmet. The subjects reported hearing the ski sound clues at 73.4±5.56 m without a helmet vs. 60.29±6.34 m with a helmet (p < 0.001). In that case the results did depend on previously used helmets (p < 0.05), meaning that that regular usage of helmets might help to diminish the attenuation of the sound identification that occurs because of the helmets. CONCLUSIONS Ski helmets might limit the ability of a skier to localize the direction of the sounds of danger and might interfere with the moment, in which the sound is firstly heard.
منابع مشابه
Effect of wearing a ski helmet on perception and localization of sounds.
Helmet use on ski slopes has steadily increased worldwide over the past years. A common reason reported for helmet non-use, however, is impaired hearing. Therefore, an intra-subject design study was conducted to compare hearing thresholds and sound source localization of 21 adults with normal hearing in an anechoic chamber when wearing a ski helmet and ski goggles or wearing a ski cap and ski g...
متن کاملHelmet rental practices at United States ski areas: a national survey.
OBJECTIVES Studies have shown that head injuries are the leading cause of death on ski slopes. Statistics on helmet rental practices at ski areas across the United States have never been reported. This study sought to determine the prevalence of United States ski areas offering helmet rental during the 2002-03 ski season. Secondarily it sought to analyze the relationships of geographic region a...
متن کاملThe effect of catechin metabolism derived from intestinal microbiota on Ca SKi cell proliferation
Background & aim: In Iran, cervical cancer is the second leading cause of death in women. Papillomavirus infection is the most important risk factor for the development of cervical cancer. Ca SKi cell is a human cervical carcinoma cell that binds the papillomavirus type 16 virus to its genome. Cactin is a type of phenol and a secondary metabolite of a plant. The purpose of this study was to inv...
متن کاملPersian Cued Speech: The Effect on the Perception of Persian Language Phonemes and Monosyllabic Words with and without Sound in Hearing Impaired Children
Objectives: This paper studies the effect of Persian Cued Speech on the perception of Persian language phonemes and monosyllabic words with and without sound in hearing impaired children. Cued Speech is a sound based mode of communication for hearing impaired people that is comprised of a limited series of hand complements and the normal pattern of speech. And it is shown that it effectively ca...
متن کاملThe Influence of Fiber Crimp on Acoustic Performance of Polypropylene Fibrous Batt
This paper reports on the effect of fiber crimp frequency on sound absorption capability of staple polypropylene nonwoven batts. Stuffer box was used to impart crimp to spun tow. Crimping of the tow renders the fibers the required textile applicability. In this work, polypropylene batts composed of staple fibers with linear densities of 9, 14, and 18 denier were employed. Three crimp frequency ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- International journal of occupational medicine and environmental health
دوره 28 2 شماره
صفحات -
تاریخ انتشار 2015