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Type 4720

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

Type 4720

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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).

USE SCENARIOS

Speech intelligibility measurements with DIRAC
Measurements including background noise

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.

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

Manuel

English

Type 4720
Lower frequency	125 Hz
Higher frequency	8 kHz
Sound pressure level	60 dB

Product Code	Description
-7841-X-100-	Mise à jour à la dernière version de DIR
AO-0586-D-030-	Câble audio de 3 m avec connecteur LEMO
ZG-0864---	Alimentation secteur pour bloc chargeur

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