纯音

基于DDS技术的听力学纯音、短纯音刺激器研制

Development of auditory Pure tone , Brief tone stimulator with DDS

方法采用双耳同时接受短纯音刺激的方法进行听觉ERP检测。

The articles are short . Methods Using short and pure tone stimulus , the ERP was detected .

用纯音暴露后，AP潜伏期的变化具有一定的频率特性。

There were some frequency characteristics in latency prolongations after exposure .

如果把两个纯音放在一起，比如单音C和G，是第五和弦。

When you have two pure tones together , like a C and a G a simple chord , that 's a fifth .

正常豚鼠cAP调谐曲线短纯音前掩蔽法与同时掩蔽法的对照研究

Comparative Study of Forward masking and Simultaneous Masking Procedures in Normal Guinea Pigs cAP Tuning Curve

实验结果表明持续声短纯音诱发耳蜗电位CM与CAP重叠；

The results indicated that the microphonic potential and the compound action potential overlapped to the continued sounds short pure tone .

纯音脉冲强度JND测试值与SPIN理论严重背离

Intensity JND of Tonal Bursts : Severe Departure from SPIN Theory

上升型和匙型纯音听阈（PTT）图的耳数占60.83%（73120）。

Upward-sloping and spoon audiogram were 60.83 % ( 73 / 120 ears ) .

使用微电极在体胞外记录方法研究了SD大鼠AⅠ区神经元对纯音频率的反应特征。

The characteristics of the acoustic response of A ⅰ neurons to the frequency of pure tone were investigated with extracellularly recording .

目的探讨人工中耳（middleearimplant，MEI）的纯音保真性。

Objective To investigate the characteristics of tone burst transmission of the middle ear implant ( MEI ) .

SOAE与纯音测听听阈间差异无显著性（P＞0.05）。

There is no significant difference between SOAE and threshold of pure tone acoustic ( P > 0.05 ) .

短纯音及切迹噪声掩蔽的短纯音ABR用于儿童听力评估的研究

Auditory brain stem responses to tone bursts and notch noise masked tone bursts in estimating hearing levels in children

两组患者疗效以纯音测听语言频率听阈均值（PTA）判定。

The therapeutic effects of the two groups were compared in the light of the pure tone averages ( PTA ) .

方法：对225例耳外伤者及60例正常人进行BAEP及纯音听力测定。

Methods : BAEP and audiogram were tested in 225 patients with ear injury and 60 normal subjects .

方法：对接触噪声作业的47例工人进行纯音测听（puretoneaudiometry，PTA）和ABR测试；

Methods Forty-seven workers exposed to occupational noises were tested by pure tone audiometry ( PTA ) and auditory brainstem response ( ABR ) .

当纯音听阈＞50dBHL时，DPOAE消失。

When the level of pure tone auditory threshold > 50 dBHL , DPOAE disappeared .

方法对116例腭裂患儿与73例正常儿童，进行声阻抗、纯音测听、听性脑反应测试，分析SOM的发生率及听力下降情况。

Methods 116 children with cleftpalate and 73 normal children were investigated by tympanogram , hearing threshold and auditory brain response .

方法：对耳外伤者50耳及正常人30耳进行ABR及纯音测听。

Methods : ABR and pure tone audiometry were tested in 50 ears of ear injuried and 30 ears of normal subjects .

有限持续时间纯音的强度JND与强度的关系

The relation between intensity JND and loudness of tone bursts

各相应频率点的纯音听阈值与DPOAE的信噪比值之间呈现明显的负相关，纯音测听与DPOAE检测结果表现出明显的一致性。

Significant negative correlation between the PTT and SNR of DPOAE were found at various corresponding frequency points .

DPOAE听力图与纯音听力图个各在频率均有很好的对应关系。

The hearing status in each frequency had good relation between the pure tone audiogram and DPOAE audiogram .

结论：BAEP与纯音测听相结合，能准确识别伪聋，评估出较为客观真实的听力状况。

Conclusions : The simulated deafness could be accurately identified by combining BAEP with audiogram and objective hearing level could be evaluated .

方法对19例（38耳）LVAS患者进行了纯音听阈测试、盖莱氏试验、声导抗测试及颞骨高分辨CT检查。

Methods Pure tone audiometry , Gelle 's test , acoustic impedance radiological examination were performed in the 19 patients ( 38 ears ) .

4～6kHzDPOAE幅值与相应频率及11.2kHz的纯音听阈相关；

DPOAE amplitudes at frequency from 4 to 6 kHz were correlated to pure tone hearing thresholds at 11.2 kHz ;

目的探讨纯音测听、声导抗测试与仔细的鼓膜检查、电耳镜检查、鼓膜穿刺等方法对分泌性中耳炎（SOM）的诊断价值。

Objective To probe the value of pure tone checking , accoustic impedence and checking up tympanic membrane , electro-otoscopy , tympanotomy in diagnosis of SOM .

目的了解舰艇艇员的听力状况并探讨纯音听力图与DPOAE听力图的关系。

Objective To investigate the auditory conditions in mariners and probe the relationship between the pure tone audiogram and DPOAE audiogram .

豚鼠对调制波频率似有较好的辨别能力，刺激参数合适时△f（am）只3&4Hz，与该种动物对纯音的频率辨别阈相近。

In guinea pigs the ability of modulator pitch discrimination seems rather good . At optimal stimulus parameters the guinea pig Δ fam amounts to 3-4 Hz , quite close to its frequency differential thresholds of pure tones .

纯音测听正常的接触噪声者与正常人相比，DPOAE的幅值及引出率亦明显降低；

The DPOAE amplitudes and the positive rates of noise group with normal pure tone threshold were obvious lower than that in controls .

结果：110例人工耳蜗置入达到了100%的手术成功率，纯音听力水平平均达到了37.6dbspl。

Result : One hundred percentage of successful implantation was achieved , and the average hearing level of tone stimulation is 37.6 dB SPL .

结果0.5～3kHzDPOAE幅值与扩展高频区（10～12.5kHz）的纯音听阈相关；

Results DPOAE amplitudes at frequency from 0.5 to 3 kHz were correlated to expanded high frequency hearing thresholds ( 10 ~ 12.5 kHz );