Detailed text transcripts for TV channel - CNN - 20110512:00:20:00
Attack that might be able to go after the helicopter. >> reporter: experts say the sound suppression technology makes some differences. first, what a standard blackhawk helicopter sounds like. this has a rihythmic kind of woosh-woosh sound. now we'll show you what a stealth helicopter sounds like. experts say this sounds a lot more vague. you may not be able to tell whether this is another vehicle entirely or helicopter. you may not be able to tell whether the helicopter's moving towards you or moving away. experts say the small wings, called stabilizers, are also unique to this chopper. they'...
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