- #1
skinnyl
- 11
- 0
Hi there all !
i have been given a question for my Advanced Acoustics assignment as follows:
An MI6 agent uses a large parabolic reflector of aperture diameter 1.20meters to focus a sound into a tube of diameter 10mm at 20% acoustic efficiency which then goes to the ear.
how far away can a whispered conversation be heard from the system?
assuming the intersity level of a whisper is 20dB at 1.0m from the source, which maybe assumed to be a point source.
i have no idea where to start with this. I am not asking for it to be done for me but a shove in the right direction would be appreciated. what methods should i be looking to use or research?
Cheers a lot
Jack
i have been given a question for my Advanced Acoustics assignment as follows:
An MI6 agent uses a large parabolic reflector of aperture diameter 1.20meters to focus a sound into a tube of diameter 10mm at 20% acoustic efficiency which then goes to the ear.
how far away can a whispered conversation be heard from the system?
assuming the intersity level of a whisper is 20dB at 1.0m from the source, which maybe assumed to be a point source.
i have no idea where to start with this. I am not asking for it to be done for me but a shove in the right direction would be appreciated. what methods should i be looking to use or research?
Cheers a lot
Jack