![]() ![]() For this purpose there is a tripod mount on the bottom plate of the TalkBox. 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. As you follow along, be sure to say the sounds and example English words out loud so that you can feel the places of articulation in your own mouth. Provide audio examples for you to hear and contextualize these sounds. Custom-designed signals may be loaded onto the CF Card and are seamlessly looped. List the English consonant sounds that occur at each place of articulation. The TalkBox also generates additional test signals: a reference spoken sentence, white noise, pink noise, 1 kHz sine wave and the chirp for delay time measurement. The applied signal is seamlessly looped to the line output and simultaneously processed in the internal DSP in real-time and played through the speaker. Frequency deviations while sampling - a dangerous trap when using portable CD players for STIPA measurements - are completely eliminated.įurther, any external signal can be connected to the system using the balanced line input. Using the balanced line output, the TalkBox can also be operated as an audio signal generator. All TalkBox STIPA-related signals are thus additionally available at a level of 70 dBA at a distance of 1 meter. The system must be tested at this increased level. In an emergency situation, the person making the announcements will tend to talk louder. The TalkBox output is fixed at these levels to comply with this standard. In English speaking cultures, this sound is only used non-verbally, where it can have a variety of meanings. ![]() The technical name for a sound of this type is an unvoiced alveolar lateral click. In other words, in many languages this sound appears as part of a word. The IEC 60268-16 standard specifies a sound pressure level for a speaker simulator of 60 dBA at a distance of 1 meter. This sound is used as an actual phoneme in many African languages such as Xhosa. The radiation characteristic corresponds broadly to the human mouth as defined in the ITU-T P.51 standard. Perfect flatness of ☑ dB over the relevant frequency range and highest quality requirements are guaranteed by an individual equalization and calibration using advanced FIR filtering and DSP technology. The NTi Audio TalkBox includes a high-precision broadband loudspeaker, with characteristic little distortion even at low frequencies. This ensures the repeatable and precise verification of the speech intelligibility STI. It offers unmatched signal purity with a minimum distortion over the complete frequency range from 100 Hz to 10 kHz. The TalkBox has been designed to latest quality standards for reliable measurements results. A variety of supplied or user-defined test signals may be used for different alignment applications. ![]() It replays the STIPA test signal at the precisely equalized frequency response, also ensuring best performance through the internal amplifier and the precision loudspeaker. The TalkBox features human head-like dimensions and is based on a solid-state-generator. ![]()
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