制品

 
TalkBox - 声学讯号产生器

声发生器(STIPA参考)

 
TalkBox是一个声音信号发生器,用于疏散和通知系统中的语音清晰度测量,以及电话会议或其他音频系统的电平校准。它允许从讲话者的麦克风到听众的耳朵执行语音清晰度STIPA的完整的端对端评估。

TalkBox通过STIPA测试信号和语音信息模拟人类讲话者(根据IEC 60268-16,60分贝@ 1米)。此外,它提供了广泛的测试信号,如正弦,粉红噪声,白噪声和延迟。

TalkBox具有人类头部般的尺寸,并基于固态发生器。它以精确均衡的频率响应重播STIPA测试信号,通过内部放大器和精密扬声器确保最佳性能。可以为不同的对准应用精确输出各种提供的或用户定义的测试信号。
 

特征

 

个别均衡

NTi Audio TalkBox包含一个高精度宽带扬声器。通过使用先进的FIR滤波和DSP技术进行单独的均衡和校准,确保在相关频率范围内±1 dB的完美平坦度和最高的质量要求。辐射特性在广泛的范围内符合ITU-T P.51。
TalkBox频率响应

调整后的产出水平

The IEC 60268-16 standard specifies a sound pressure level for a speaker simulator of 60 dBA in 1 meter distance. The TalkBox output levels are calibrated to comply with this standard. To avoid operating failures the TalkBox has no volume control.


Lombard Effect

The human voice tends to be raised in level in emergency situations. In order to cope with this so called Lombard effect, all STIPA related signals are additionally offered at an increased level of 70 dBA at 1 meter.


Balanced Line In / Out

Using the balanced line out, the TalkBox operates as a signal generator. Sampling frequency deviations - a dangerous trap when using portable CD players for STIPA measurements - are completely eliminated. Any external signal can be connected to the system using the balanced line input. The applied signal is transparently looped to the line output and processed in the internal DSP in real-time to appear equalized at the speaker.

TalkBox后视图

Different Test Signals

The TalkBox also generates additional wave forms: White noise, pink noise, sine wave, reference speech signals and the delay time measurement chirp. Custom designed signals may be loaded onto the CF Card and are seamlessly looped.


Mic Stand Mount

Typically the NTi Audio TalkBox is positioned on a conventional mic stand in front of the talker's microphone; exactly at the position of the actual talking person during the announcements. The TalkBox features a mic stand mount on the bottom plate.
在展台上的TalkBox(mic stand not included)


Remote Mute

For measuring speech intelligibility in large buildings the remote mute functionality of the TalkBox is of great help. Any external switching device may be connected to the mute input, allowing e.g. a cell phone controlled ON/OFF functionality. Thus the STIPA test signal might be muted between measurements.


Universal Power Supply

The TalkBox supports a power supply range 10 - 18 VDC. An external power supply for worldwide operation is included. Alternatively the optional battery pack might be used.
 

Order Information

 
NTi音频TalkBox

NTi Audio TalkBox

声波发生器 

NTi Audio#:600 000 085