Yeung E, Boothroyd A, Redmond C
Center for Research in the Speech & Hearing Sciences, Graduate School, City University of New York, New York.
Ear Hear. 1988 Dec;9(6):342-50. doi: 10.1097/00003446-198812000-00011.
This paper describes a wearable sensory aid that provides the deaf with tactually encoded information about intonation. Fundamental frequency is represented as both place and rate of vibration in a linear array of solenoids. Pitch extraction is accomplished through low-pass filtering and peak detection. A microcomputer is used to measure pitch period, which in turn determines which of the solenoids is actuated. By comparing consecutive periods, the system discriminates against random, noise-related inputs. The device is switchable between 1-, 8-, and 16-channel operation. The electronics package is contained in a case that may be worn on a belt. The solenoid array is worn on the forearm. The system is powered by five, rechargeable lithium cells and runs for at least 6 hours between charges. Proposed developments include the incorporation of digital pitch extraction methods and the option to use the spatial output dimension to encode speech parameters other than fundamental frequency.
本文介绍了一种可穿戴的感官辅助设备，它能为聋人提供有关语调的触觉编码信息。基频通过螺线管线性阵列中的振动位置和速率来表示。音高提取通过低通滤波和峰值检测来完成。使用微型计算机测量音高周期，进而确定驱动哪个螺线管。通过比较连续周期，该系统可区分随机的、与噪声相关的输入。该设备可在1通道、8通道和16通道操作之间切换。电子组件装在一个可以系在腰带上的盒子里。螺线管阵列戴在前臂上。该系统由五节可充电锂电池供电，充电间隔至少可运行6小时。拟议的改进包括采用数字音高提取方法，以及选择使用空间输出维度来编码除基频以外的语音参数。
