Active Noise Cancellation

A demonstration of an active noise reduction technique. We review passive noise management and go on to demonstrate phase-related active noise reduction.

[oturgator]

It is very rare to find high calibre content like this one anymore. This is pure gold.

[greglantz]

Wow. This youtube learning content is extraordinary.

[rickbailey]

9:00 One of the best physical demonstrations of phasing I've ever seen! Well done video, and subsequent transference of knowledge.

[joseb.junior]

Thanks YouTube suggestions, you were a good boy this time.

[yetifanuk]

This guy is restoring my opinion of humanity, love the idea that there are other audio nut in his garage tinkering. Big shout from the UK.

[_arrgh]

The 600 speaker 26, 400 watt "Wall of Sound" built in 1974 by Stan Owsley used this technique to eliminate the feedback from the microphones on stage. Each mic had a second mic 180 degrees out of phase two inches apart or so. Vocals went into the top mic about two inches above a lower mic, the second mic cancelled the sound on stage: no monitors!

The sound quality at Dead concerts was superb; almost 600 meters away. The show could be heard 2 miles away! Not bad for 1974!!

[batbawls]

Easily one of the best channels on YouTube

[SRWC]

I work for a sound company manufacturing theater speakers and haven't come across anything this amazing. Thank you for you research and incredible explanations!

[dinnae]

I learned so much. Thank you for taking us through the entire theory behind this from beginning to end

[BlockDesignz]

Extremely well explained. No images or diagrams needed, just clearly thought out wording!

[thesuntzu]

Best description of phasing I’ve ever heard. Amazing stuff. Stay warm up there!

[gilligancharliebrown]

I've been fascinated with the concept of active noise cancellation ever since I first heard of it many years ago. You made understanding it's mitigation so simple and I truly appreciate it. Thank you for all your efforts and subject matter.

[deadbolt]

As I listened to this in my truck, I found some standing waves during the demonstration part of the video. Moving my head 6 inches from the driver seat made the sound much quieter. Pretty cool secondary demonstration of the impact of interacting pressure waves

[bclements]

Amazing live demonstration of both physical and electrical phasing of sound to cancel out unwanted noise.

[joshpayne]

SO REFRESHING to have a YouTube channel with someone who actually has something to say! Love your videos.

[ramheyhey]

Thanks for teaching a young engineer about some awesome things!!

[TheRealFLAMP]

this video caught me off guard, it's so genuine and informative, clearly explained and never went into the weeds. this guy is great

[glenaw]

Very nicely done. I will be building a cnc machine with a enclosure and this gives me a lot of good information on how to make it even quieter.

I would like to offer my compliments on your knowledge and your ability to convey the information with such clarity and understanding

[pedrocavaleiro]

Although most of it wasn't unknown to me, your ability to synthesise and maintain the simplest line of thinking makes this a teaching gem.
Thank you for sharing!

[berniestep]

Well - structured discourse; exceptionally clear explanations of the theory; precise, technical demonstrations - Brilliant! This guy should be government-funded he's so good. Thank you!