[Updated below with answer and winners.]

We’ve got some fantastic prizes up for grabs in the latest installment of our Name that Tech Tune challenge: Weekend passes to the third annual Maelstrom International Fantastic Film Festival (MIFFF) a showcase of action, animation, fantasy, horror, and science fiction cinema coming up Sept. 16-18 at McCaw Hall Seattle.

And appropriately enough, our sound this week is from a movie, a well-known 1980s genre film. We’re looking for both the name of the movie and the name of the device or equipment that makes this sound. If you’ve never played the contest before, here’s how it works: Listen to the sound below, and if you know it, send your answer to contests@geekwire.com. From the pool of correct answers, we’ll pick three people at random, each of whom will win a pair of MIFFF passes. Here’s the sound.

[audio https://cdn.geekwire.com/wp-content/uploads/2011/09/techtune13.mp3]

Here’s the MP3 in case anyone has issues with the audio player.

Do you know it right off the bat? Or are you stumped? We gave quite a few clues during the GeekWire radio show and podcast, including the fact that it’s not from Back to the Future or any of the Star Wars films, and it’s worn on the back. Listen to the segment below for those clues and more.

[audio http://wherearejohnandtodd.com/techtune13segment.mp3]

Here’s the MP3 for the segment.

Once again, if you know the movie and the name of that particular device or equipment, send your answer to contests@geekwire.com. We’ll give the answer and announce the winners on our next show.

[Update, Sept. 9: The answer, as many of you knew, was the Proton Pack from Ghostbusters. (We also accepted particle accelerator and other variations.) Congrats to our winners, Ingrid, Lureane and Dane, who’ve been notified via email.]

Be sure to catch the full GeekWire radio show and podcast on GeekWire.com this weekend. Subscribe in iTunes or Zune. Also tune in on 97.3 KIRO-FM in Seattle at 7 a.m. Saturday and 1 p.m. Sunday.

By the way, the answer to last week’s challenge was the Motorola StarTAC. Congrats to our winner, Brett Frosaker, whose name was drawn at random from the pool of correct answers. He’ll be getting a Wii Play Motion controller bundle as a prize.

A big thanks to MIFFF for the tickets for this week’s contest. The festival this year will debut five feature films and more than 40 short films to movie fans across the Pacific Northwest. See the MIFFF site for more info. Here’s this year’s festival trailer as a teaser.

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