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Noise-canceling headphones without the headphone

spectrum.ieee.org

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Re: Noise-canceling headphones without the headphone

#21

Post by bawolff »

ngneer wrote: post #5

Always great to see development in this domain. IWAENC and Silentium come to mind as the forefront. I hope one day the researchers will realize that they are trying to cancel the wrong source. Instead of cancelling noise external to the human, the real breakthrough will be to cancel the human voice. This will confer privacy and other benefits in areas of increased population density. I would prefer a smartphone to ha…

> I hope one day the researchers will realize that they are trying to cancel the wrong source

I dont think its due to intentionality just that low pitch is easier to cancel than high pitch things like voices.

Re: Noise-canceling headphones without the headphone

#22

Post by the__alchemist »

mattmaroon wrote: post #7

My new Ram 2500 diesel has active noise canceling and is the quietest ICE vehicle I’ve ever been in. Probably quieter than electric vehicles at high speeds.

Apparently electric vehicles like Tesla are noisy on the highway, where external noises dominate; due to less sound-deadening material to save weight.

Re: Noise-canceling headphones without the headphone

#23

Post by supernova87a »

I thought this was already in planes, such as Dash 8 (Q400) -- noise cancellation, although for the general cabin, not the individual seat passenger:

https://www.flightglobal.com/quiet-revolution/31793.article

https://apps.dtic.mil/sti/pdfs/ADA446777.pdf (see plots at end)

Re: Noise-canceling headphones without the headphone

#24

Post by kindall »

mattmaroon wrote: post #15
MrsPeaches wrote: post #10

Earlier quoted context omitted.

Can you switch it off/on to hear the difference? Would be interested to know the difference perceived. Are there any other cars that do this?

I wish because I’m curious. You have to buy some aftermarket hardware for that. And yes. Mostly luxury cars ATM but it’s growing.

Acura RL was one of the first to have active nose cancellation, in 2005.

Re: Noise-canceling headphones without the headphone

#25

Post by mattmaroon »

the__alchemist wrote: post #22
mattmaroon wrote: post #7

My new Ram 2500 diesel has active noise canceling and is the quietest ICE vehicle I’ve ever been in. Probably quieter than electric vehicles at high speeds.

Apparently electric vehicles like Tesla are noisy on the highway, where external noises dominate; due to less sound-deadening material to save weight.

I’ve noticed that.

Re: Noise-canceling headphones without the headphone

#26

Post by PurpleFoxy »

ngneer wrote: post #5

Always great to see development in this domain. IWAENC and Silentium come to mind as the forefront. I hope one day the researchers will realize that they are trying to cancel the wrong source. Instead of cancelling noise external to the human, the real breakthrough will be to cancel the human voice. This will confer privacy and other benefits in areas of increased population density. I would prefer a smartphone to ha…

I don’t think this is even possible. Noise canceling works by creating reverse waves that hit your ears at the same time. You have to be able to calculate how long it will take for those waves to hit each set of ears and be able to direct sound at them.

Re: Noise-canceling headphones without the headphone

#27

Post by gruez »

yellow_lead wrote: post #2

I expected them to be put elsewhere in the plane. For instance, my office has a floor with exposed AC units, and "noise-cancelling"[1] machines next to them that remove most of the sound of the AC. I wonder if something similar could be done for planes. [1] Not sure exactly what the name of this device is.

Do you have a picture of what it looks like? AFAIK room-wide noise cancellation can't work because noise cancellation requires the exact position of the listener to be known, otherwise the sound will not be canceled out and might even be amplified. see this animation: https://en.wikipedia.org/wiki/File:Two_sources_interference...., if one of the wave sources is the AC and the other is the noise cancellation machine, only some areas will have no sound, but others will have even louder sound.

Re: Noise-canceling headphones without the headphone

#28

Post by GuB-42 »

JBiserkov wrote: post #3

>wearing active noise canceling headphones for extended periods of time can be uncomfortable and even cause injury Does anyone know what type(s) of injury is this referring to, how long is too long and how widespread/likely it is?

I don't understand either. In fact, active noise cancelling pilot headsets are usually more comfortable and less tight fitting. This is because by being noise cancelling, these can get away with lighter passive noise isolation.

The only kind of injury I can think of is related to being less aware of your surroundings.

Re: Noise-canceling headphones without the headphone

#29

Post by davewritescode »

the__alchemist wrote: post #22
mattmaroon wrote: post #7

My new Ram 2500 diesel has active noise canceling and is the quietest ICE vehicle I’ve ever been in. Probably quieter than electric vehicles at high speeds.

Apparently electric vehicles like Tesla are noisy on the highway, where external noises dominate; due to less sound-deadening material to save weight.

Can confirm, the Model3 is not a wonderful place to be at 80 MPH. Wind a tire noise is embarrassingly bad for a car that can be optioned out to $60k.

Re: Noise-canceling headphones without the headphone

#30

Post by rakwoelq »

Anechoic wrote: post #6
JBiserkov wrote: post #3

>wearing active noise canceling headphones for extended periods of time can be uncomfortable and even cause injury Does anyone know what type(s) of injury is this referring to, how long is too long and how widespread/likely it is?

I suspect the article is referring to things like bruising from tight fitting earcups or maybe muscle strain from the weight of the headset, not something specifically related to the noise canceling function (except perhaps from excess noise caused by ANC circuit malfunction that might cause a temporary threshold shift)

Aftermarket options can be purchased to mitigate discomfort from ear protection equipment.

The Sightlines Gel Ear Pads from NoiseFighters is a popular option for earcup replacement.

The IceVents Classic Ventilated Headband from Qore Performance is a popular option for headband replacement.

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