STI measurements

Hi Angelo....here's Winhay another aurora user.

I have a doubt with the STI measurements.

Specifically with impulse response for STI

I readed we can use a sweep signal with no equalization and no necessarily 62 dBA......ok, but about my source??.....

For example, can I use the impusle response used for evaluating acoustical parameters for evaluating the STI parameter?...(omnidirectional source)

or

When I measurement STI parameters I MUST obtain the IMPULSE response with a directional speaker ( emulate directionality of the male voice)


I know I'm must use a directional speaker for obtain the filter signal of the source......but If i have already the impulse response of a room
measured with a omnidirectional source it's necesary obtain the impulse response with a directional speaker?....

I hope my question can be understand

Regards