Product Overview
The NTi Audio TalkBox is an active acoustic signal generator that simulates a human talker (60 dBA @ 1 meter according to IEC 60268-16) with the STIPA test signal and spoken messages. This allows for speech intelligibility measurements in evacuation and announcement systems, as well as for level alignment of teleconference or any audio system incorporating a microphone input. It allows performing complete end-to-end evaluation of the speech intelligibility STIPA from the talker’s microphone to the listener’s ears. Further it provides a wide range of test signals like sine, pink noise, white noise and delay. The Audio TalkBox also offers a balanced line In/Out connector and a FIR equalized speaker (level and phase).
The TalkBox features human head-like dimensions and is based on a solid-state-generator. It replays the STIPA test signal with a precise frequency response, individually equalized for each TalkBox, also ensuring best performance through the internal amplifier and the precision loudspeaker. A variety of supplied or user-defined test signals may be precisely output for different alignment applications.
Applications
- Life Safety Systems
- Installed Sound
- AV Installations
- Industrial
Includes
- Mains Power Adapter
- CF Card
- Soft Carrying Case
Features
- Individually Equalized: NTi Audio TalkBox includes a precise broadband loudspeaker. Precise flatness of ±1 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 radiation characteristic complies with ITU-T P.51 in wide ranges.
- Calibrated Output Level: 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: Human voice tends to be raised in level at 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 Out: Using the balanced line out, the TalkBox operates as a signal generator. Sampling frequency deviations - a dangerous trap when using CD players for STIPA measurements - are eliminated.
- Balanced Line In: 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.
Specifications
- SKU: 600 000 085
- Waveform:
- Up to 15 different signals
- Waveforms can be added / changed by the user
- Factory signal set:
- NTi Audio STIPA Test Signal, Reference Speech Signal, Sine 1 kHz, White Noise, Pink Noise, Delay Time Chirp
- Line Out:
- XLR, balanced 100 Ohm, unbalanced 50 Ohm
- Maximum output level: +18 dBu
- Line Input:
- XLR, balanced 38 kOhm
- Maximum input level: +18 dBu
- Internal delay XLR input to speaker: 59 ms
- CF Card:
- 256 MB included, FAT32 formatted
- Wave file format: 16 Bit, 44.1 kHz mono
- Acoustical Flatness:
- STIPA band levels (in axis):
- typ. < ± 0.5 dB @ 24°C
- typ. < ± 1.0 dB @ 10°C - 30°C
- Acoustical Output Level:
- STIPA: 60 dBA @ 1m ± 0.5 dB, acc. IEC60268-16
- STIPA band sensitivity gradient:
- 0.07 dB / °C (average)
- Power Supply:
- 10 - 18 VDC, 10 W
- External switching power supply included (for worldwide usage 100 V .. 240 V)
- External Mute:
- Jack 3.5 mm (1/8“)
- Floating switch required
- Mounting: Mic Stand 5/8” with Adapter to 3/8”
- Dimensions: L x W x H: 150 x 150 x 175 mm (5.9 x 5.9 x 6.9 inch)
- Weight: 3.5 kg
