Noise cancelling headphones

headphones

Here are plans for building a noise canceling headphone circuit. Noise cancellation works by placing microphones close to the ear and then playing the recorded sound out of phase causing destructive interference. Commercial headphones have the mics and power supplies built into the headphones. The page has some other fun suggestions for playing around with the stereo mic setup. If you’re looking for a cheaper route, there is this.

[thanks flybri and h-tech]

Comments

  1. dan says:

    FIRST POST!! wowz. ;

  2. jcl236 says:

    Why can’t an inverter chip like a 7404 be used to invert the sound waves picked up by the microphones? When the two sound waves were combined they would cancel each-other and remove the unwanted sound.

  3. Wow. A truly useful hack. Thank you Hack-a-day. This is what i need for my electronics course and will be great for killing the jetengines on my computer (AKA 6*80mm fans that were my brothers adding)

    The only recommendation that i would have would be to combine the two projects and USE Cat5 wiring. Its perfect. 4 twisted pairs in one cable.

    With the right combonation you could end up with some headphones I can now hear that idiot sneek up behind me in battlefiled vietnam.

  4. hwyman says:

    Yeah…I shouldn’t have any problems walking onto an airplane with one of those strapped to my belt. ;)

  5. craash420 says:

    jcl236:
    The 7404 is digital instead of analog.

  6. mikeroq says:

    i made my speakers into ones that use cat 5 patch cables for added length, a week ago. this is a nice project but doesnt it seem to drift into making a listening device, lol.

  7. t3h says:

    Excellent, that’s what I’ve been looking for for ages!

  8. george says:

    is there a software version of the circuit so I can use my computer to generate the cancelling noise?

  9. andy says:

    I’ve built these headphones using the Ryckebush circuit before. (about 4 years ago…) They worked great initially, but the battery life was horrendous, the box was ugly and HUGE (not fun in airports, I never tried to use the headphones on an airplane again after 9/11 happened, since I wanted to actually be able to get through security.), and after 2 airplane flights it stopped working reliably.

    It cost me over $40-50 for the parts IN ADDITION to a pair of headphones themselves and went through $3-4 of batteries every 2-3 hours.

    When I first built them, ANC headphones available on the market were all extremely expensive, and the homemade ones were cheaper. This is no longer true.

    It’s a far better idea to buy a pair of Philips HN100s or HN110s off of eBay – I bought mine for $15 *including* shipping, and they blow away my homemade ones in every regard. Battery life off of a single AAA (instead of a pair of 9vs) is insanely long, the cancellation is better, and the unit is far more compact.

  10. Jessica says:

    Hi, was wondering if anybody here could help me modify my current Skullcandy Skullcrusher to add some noise cancellation technology.

    I love em for the bass, but I can hear everything. I have some old Sony MDR NC 20 I don’t like and wouldn’t mind dismantling.

    My skullcrushers have a compartement for 1AA battery already for the subwoofer technology.

    Could anybody help me with figuring out how to hack my current skullcrushers with the noise cancellation technology from my sony’s to make the ultimate pair of headphones?

    thanks for the help!!

    write me back with a relevant email title (so I know it’s not junk mail)
    cool_jessica@hotmail.com

  11. Erik says:

    Incredible… what an idea! A DIY pair of noise canceling headphones! To be honest i’d stick with a pre-built pair of noise cancelling headphones from sennheiser or Audio echnica.

    It seems like a LOT of hassle to build them yourself! :)

  12. Incredible… what an idea! A DIY pair of noise canceling headphones!

    To be honest I’d go with a pre-built pair of noise cancelling headphones from Sennheiser (http://www.hifiheadphones.co.uk/sennheiser-man-17.html) or Audio Technica (http://www.hifiheadphones.co.uk/audio-technica-man-18.html)

    It seems like a LOT of hassle to build them yourself! :)

  13. william m says:

    I’m looking for cancellation of industrial noise coming from outside the house. I envision a microphone outside picking up the source noise, connected to a pc in the house running software to cancel the noise. The inverse noise would be broadcast by speakers in the room — so I could sleep without earplugs or headphones. The source noise is from compressors or diesel engines and is very constant/unchanging. Any ideas? The scenario seems identical to noise cancelling headphones: The mic is external, the cancelling noise is produced in an area isolated from the source. (My room is equivalent to the inside of the earphones.) I would think this could be a useful and popular application.

  14. andy says:

    William – did you get anywhere with this? I could do with a set up EXACTLY the same as you’re after – any hints?

  15. Ruhande Mohammad says:

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  16. Advantageously, the post is in reality the best on this worthw hile topic. I harmonize with your conclusions and will thirstily look forward to your incoming updates. Just saying thanks will not just be adequate, for the wonderful clarity in your writing. I will immediately grab your rss feed to stay abreast of any updates. Good work and much success in your business dealings!

  17. This is a great tip about noise-canceling. I find it useful to apply with my audio equipments. I have some pairs of Sennheiser and Skullcandy. I will certainly find it useful to apply with my headphones.

  18. Thank you for sharing great tips. I love noise canceling headphones. Especially SkullCandy

  19. Thanks for the info! Right now I am really into the new Dr Dre Headphones. I was considering building some myself, but I just like the style of the dre headphones.

  20. I agree with the above post. Personally I cannot understand why you would not want to make an effort in this regard anyway. Only the other day, at work we had exactly the same conversation and came to a similar decision

  21. Adit lessai aceh says:

    Have you the simple headphone amp. Using just only 3v batt?
    Thx much

  22. supermorph says:

    hi, i bought a hd projector from ebay, recieved it yesterday, the fans are very noisy, can i produce some sort of kit to cancel the noise generated by the fans?

    if so, i would need help.

    thanks
    supermorph

  23. Angel says:

    So teach me how to make my own “turtle beach”
    I pretty much want to know how to make my own gaming headset.
    I need a diagram/blueprint/a schematic design or something.

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