When it is struck, a tuning fork produces an almost pure tone, retaining its pitch for a long period of time.
当被击打的时候，音叉会发出近乎纯净的音调，其音高会保持很长时间。
Methods to check on objective acoustic impedance and subjective pure tone audiometry.
方法对外伤性聋进行客观声导抗测试和主观纯音测试。
Objective to investigate the effect of noise on DPOAE in pilots and its relation with pure tone auditory thresholds.
目的了解噪声对飞行员畸变产物耳声发射(DPOAE)的影响及其与纯音听阈的关系。
The audiogram of pure tone, of noise and of distractive energy are obtained. The measuring device is composed of simple apparatus in lab.
利用实验室现有的简单设备组成实验装置，测定了正常的听阈曲线、有噪声干扰时的听阈曲线、 分散注意力时的听阈曲线。
Sequential multipoint pulse stimulation was adopted, twice each week, for 20 consecutive weeks (40 sessions) and then pure tone test was carried out repeatedly.
使用顺序连续多点脉冲刺激，每周2次，连续20周(40次)后复查纯音测听。
Methods the pure tone thresholds of 30 subjects (60 ears) were measured by pure tone audiometry and MCML was obtained by means of the same frequency tone masking test.
方法30例受试者(60耳)分别进行纯音测听，首先测出双耳的纯音听阈，然后应用同频音掩蔽试验测试各个频率的MCML。
Objective to investigate the relationship between minimum contralateral masking level (MCML) and pure tone threshold of the masking ears by the same frequency tone masking test.
目的应用同频音掩蔽试验观察不同个体最小对侧掩蔽级(MCML)与主观纯音听阈之间的关系，进而通过MCML判定被试者主观真实听阈。
The system can issue a pure tone, tone twitter, narrowband noise and natural sound of the voice signal, and can adjust the loudness and frequency of the signals with some accuracy.
该系统能发出纯音、啭音、窄带噪声和自然声等声音信号，并可对信号进行一定精度的响度和频率调节。
Methods We conducted the pure tone audiology, glycerol test, electrocochleogram(ECochG) , water caloric test, vestibular evoked myogenic potentils(VEMP) in 120 aural vertigo patients.
方法对120例耳源性眩晕患者进行纯音听阈测试，甘油试验，耳蜗电图，冷热水试验，前庭诱发肌源性电位检查。
Objective To investigate the difference and relationship between auditory steady-state evoked response(ASSR threshold), auditory brain stem response(ABR threshold) and pure tone threshold.
目的研究听觉稳态诱发反应（ASSR）和听性脑干反应（ABR）阈与纯音听阈的差别和相关性。
Result: Pure tone and ABR waveforms were abnormal in 20 subjects (21 ears), moreover acoustic stapedius reflex and the vestibular function were abnormal in 19 subjects.
结果：20例(21耳)纯音测听、听觉诱发电位均异常，19例镫骨肌声反射及前庭功能异常。
Pure tone audiometry: Slight sensorineural hearing loss mainly at the lower frequency may be detected during or soon after attack. It may be recovered or lightened after the attack.
纯音测听：发作时或发作后不久，可检测到轻度的、以低频听力损失为主的感觉神经性耳聋，发作后恢复正常或减轻。
Scientists asked participants to detect the onset or disappearance of different pure-tone sounds within soundscapes of ranging complexity.
科学家们要求被试者探测复杂性在一定范围内的音景中不同纯音的出现和消失。
Observation measures were bone conduction thresholds, changes of ossicular chain, preoperative and postoperative changes of pure-tone hearing.
观察术前骨气导阈值，听骨链改变，手术前后纯音听力改变。
All the subjects sat in the standard audiometric room, the air and bone conducted pure-tone auditory thresholds were examined by the professional technician.
受试者坐在标准测听室内，由专业技师检查气、骨导纯音听阈。
The results indicated that DPOAE gram was accurate in reflecting the range of frequencies of injured ears; the amplitude and incidence of DPOAE were associated with pure-tone behavioral threshold.
结果表明：DPOAE可以准确地反映患耳相应的频率损失范围，其检出率和幅值与主观听阈水平有关。
The results indicated that DPOAE gram was accurate in reflecting the range of frequencies of injured ears; the amplitude and incidence of DPOAE were associated with pure-tone behavioral threshold.
结果表明：DPOAE可以准确地反映患耳相应的频率损失范围，其检出率和幅值与主观听阈水平有关。
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