Jerger S, Jerger J
Ear Hear. 1982 Nov-Dec;3(6):325-34. doi: 10.1097/00003446-198211000-00007.
Performance-intensity (PI) functions for Pediatric Speech Intelligibility (PSI) test materials were obtained in 40 normal-hearing children between 3 and 6 yrs of age. PSI messages were monosyllabic words and sentences presented in quiet and in the presence of a competing speech message. The message-to-competition ratio was constant across intensity levels: +4 dB (words) and O dB (sentences). Maximum speech intelligibility scores were 100% correct in all children for all conditions. The steepness of the PSI-PI functions, defined by the intensity range yielding performance between 20 and 80%, ranged from 8 to 12 dB. Threshold levels (50% correct) ranged from 21 to 26 dB SPL. With one exception, chronological age did not significantly influence the steepness of PSI-PI functions. The exception was the increasing steepness with increasing age noted for sentences in competition. A significant chronological age developmental trend was noted for all speech threshold results.
在40名3至6岁的听力正常儿童中获得了小儿言语清晰度（PSI）测试材料的性能强度（PI）函数。PSI信息是单音节词和句子，分别在安静环境以及存在竞争性言语信息的环境中呈现。在各个强度水平下，信息与竞争的比例保持恒定：单词为+4 dB，句子为0 dB。在所有条件下，所有儿童的最大言语清晰度得分均为100%正确。PSI-PI函数的陡峭程度由产生20%至80%性能的强度范围定义，范围为8至12 dB。阈值水平（50%正确）范围为21至26 dB SPL。除了一个例外情况，实际年龄对PSI-PI函数的陡峭程度没有显著影响。该例外情况是，在竞争性句子中，随着年龄增长陡峭程度增加。在所有言语阈值结果中均观察到显著的实际年龄发展趋势。
