Echo speech source - 4720

Echo Speech Source quickly and easily performs speech intelligibility measurements in accordance with IEC 60268-16.

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Type 4720 - Echo Speech Source

Echo Speech Sound Source outputs calibrated signals for measuring a range of speech intelligibility parameters in conjunction with DIRAC 6. The received signal is picked up by a microphone and analyzed in DIRAC, which calculates an accurate qualification of the speech intelligibility through various parameters such as the Speech Transmission Index (STI).

With a calibrated speech source there is no need for external

equalizers or speech level adjustment. The signal can be set at an elevated level, making STI measurements possible - even if the background noise is significant. DIRAC 6 recognizes the output level and corrects calculations appropriately.

For STI measurements, it contains pink MLS signals. The MLS is far less intrusive than an e-sweep signal. In addition Echo Speech Source can be used to set the volume of PA systems using a male speech signal with a standard level of 60 dB(A) at 1 meter.

USE SCENARIOS

Speech intelligibility measurements with DIRAC
Measurements including background noise

KEY FEATURES:

Wireless sound source for DIRAC 6
Fully calibrated sound levels and spectra
Mouth directivity
Five built-in stimulus signals
Intermittent stimulus accounting for background noise
External input and output
Compact and lightweight (10x10x17 cm, 1 kg)
Mounts on standard tripods
Battery powered
External power supply included

for Echo Speech Source Type 4720

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Echo speech source - 4720

Type 4720 - Echo Speech Source

USE SCENARIOS

KEY FEATURES: