CLASSROOM AMPLIFICATION SYSTEM

课堂扩音系统

• 批准号: 6182434
• 负责人: DAVID L FRANKLIN
• 金额: $ 25.8万
• 依托单位: AUDIOLOGICAL ENGINEERING CORPORATION
• 依托单位国家: 美国
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6182434
• 关键词: assistive device /technology; bioengineering /biomedical engineering; biomedical equipment development; communication disorder aid; hearing disorders; human subject; loudness; questionnaires; telecommunications; training aid

The purpose of this work is to develop a classroom amplification system based on digital 900 MHZ cordless technology. The need for such amplification systems arises because of the large number of students in regular classrooms with transient hearing losses due to otitis media, and the even larger number of special needs classrooms effected by the same problem. Recent studies indicate that, on the average, 25% to 30% of children in primary schools will have this such hearing deficits at any given time, although only a very small percentage of these will be classed as hearing impaired. For special needs classes, the number approaches 75%. Data gathered by the National Center for Health Statistics indicates that this problem increased by at least 45% between 1981 and 1988 for children 15 and under, and by 224% for children age 2 and under. It is clear that because of interference problems inherent in the usual form of FM Radio communication systems, that the present methods used in classrooms cannot be used in more than a few rooms of any given school before serious interference problems occur. The large development funds available to the telephone industry has enabled them to develop and market extremely advanced technology in 900 MHZ cordless phone at very low cost. These phones are far superior to other FM systems at eliminating interference. Purchasing and re- manufacturing such phones for use in classrooms opens the technical possibility of amplifying virtually all classrooms at ver modest cost. PROPOSED COMMERCIAL APPLICATION: This device has extensive market potential in over 2,000,000 US classrooms alone. It also has great potential for portable amplification systems.

这项工作的目的是开发基于数字900 MHz无绳技术的课堂放大系统。由于中耳炎造成的瞬时听力损失，以及由于同一问题所影响的更多特殊需求教室，因此需要大量的普通教室中的学生数量大量学生。最近的研究表明，平均而言，小学中有25％至30％的儿童在任何给定时间都会出现这种听力障碍，尽管其中只有很小的部分将被归类为听力障碍。对于特殊需求课，该数字接近75％。国家卫生统计中心收集的数据表明，该问题在1981年至1988年之间至少增加了15岁及以下儿童的224％，至少增加了224％。显然，由于FM无线电通信系统的通常形式固有的干扰问题，因此在严重干扰问题发生之前，在教室中使用的当前方法不能在任何给定学校的几个房间中使用。电话行业可用的大型开发资金使他们能够以非常低的成本开发和销售900 MHz无绳电话的极其先进的技术。这些手机在消除干扰方面比其他FM系统优越。购买和重新制造此类手机用于教室，为几乎所有教室以微不足道的成本放大所有教室的技术可能性。拟议的商业应用：仅在2000万美国教室中，该设备就具有广泛的市场潜力。它也具有便携式扩增系统的巨大潜力。