Noise Cancelling Headphones

[equus]

Those that have the QC20's
1. Did you haggle in Dj's or were they on sale?
2. how do you find the battery pack size and location when 1. attached to laptop\tablet, 2. When attached to phone?

1. DJ offers price match. Just find somewhere else (Australian) advertising at a price, and they will match it. Just beware of offshore e-stores advertising in $AU with free shipping direct from OS, as these are not including GST, and DJ won't match to them. So, didn't really haggle as much as get them to match

2. Haven't attached to tablet/laptop yet. Attached to phone, seems OK, but tends to hang on cable. Not sure that is going to be good for it long term, so will just get a rubber band to attach to phone.

 

[markis10]

1. DJ offers price match. Just find somewhere else (Australian) advertising at a price, and they will match it. Just beware of offshore e-stores advertising in $AU with free shipping direct from OS, as these are not including GST, and DJ won't match to them. So, didn't really haggle as much as get them to match

2. Haven't attached to tablet/laptop yet. Attached to phone, seems OK, but tends to hang on cable. Not sure that is going to be good for it long term, so will just get a rubber band to attach to phone.

In the case of DJs get in quick, they are quitting Bose now that Dick Smith has taken over electrical.

 

[JessicaTam]

1. DJ offers price match. Just find somewhere else (Australian) advertising at a price, and they will match it. Just beware of offshore e-stores advertising in $AU with free shipping direct from OS, as these are not including GST, and DJ won't match to them. So, didn't really haggle as much as get them to match

2. Haven't attached to tablet/laptop yet. Attached to phone, seems OK, but tends to hang on cable. Not sure that is going to be good for it long term, so will just get a rubber band to attach to phone.

Isn't technology great. Especially when we still need rubber bands/paper clips/string etc to make things that little bit better!

 

[fall502]

Thanks for the replies Spruce & NM

 

[NM]

My daughter has a high school physics extended research assignment to complete and the topic has to be something to do with sound waves. She has chosen to look into active noise cancellation.

So to assist her with her research and to ensure she has a good understanding of the technologies, I set up some demonstrations/experiments. One of these was to measure the actual noise reduction of active noise cancelling headphones. We did this by inserting a small microphone (Mipro MU-55HN removed from its mounting frame) under the ear cushions of my Bose QC15 headphones and measuring the audio level of a test signal being played through a speaker external to the headphones. We used a 100Hz sinusoidal test signal and measured the level picked up on the reference microphone with the Active Noise Cancellation switched off and then switches on, allowing the noise reduction to be calculated.

Here are the results. The red waveform is the original 100Hz noise source signal that was fed to am amplifier (Yamaha P5000) and speaker (EV ZX5). The yellow waveform is the output from the reference microphone (Mipro Mu-55HN) via an EV RE2 wireless transmitter connected to a Yamaha LS9 mixer (as see measured on an Omni Out via a mix-bus).

With the headphones power switch set to off, the following was observed:

The with the headphones switched on, the follwoing was observed:

Converting the measured yellow trace peak-to-peak voltages to RMS voltages (V[SUB]RMS[/SUB] = V[SUB]pk[/SUB]/(2 x √2), and the noise reduction is measured as:
20 x Log[SUB]10[/SUB](V[SUB]2[/SUB]/V[SUB]1[/SUB])
= 20 x Log[SUB]10[/SUB](12.73/178.2)
= -22.9dB, which I think is pretty darn impressive.

We did not optimise this result by testing with different noise source volume levels or seeking to find the frequency where maximum reduction occurs. We used 100Hz as that was the same frequency used for some other testing and measurements we did (not with the noise cancelling headphones) and wanted the scope outputs to be consistent.

 

[PLANT]

Need you to do the test now on QC20's please!

 

[NM]

Need you to do the test now on QC20's please!

Now that would be a little difficult with the "reference microphone" I was using . I guess if I had some of that Mythbusters Ballistics Gell to make a simulated head, then I could insert a microphone inside the "ear" and measure. But not sure my daughter, who was wearing the QC15s with the microphone inserted (wanted a real head to eliminate any isolation variations) would be happy for me to insert a microphone through her nose into her ear

 

[DrA]

My Sennheiser's died on me today, lost all audio in the left ear. They had a good run - almost 5 years. Makes me sad, they were awesome. So now I'm in the market for a new pair of noise cancelling headphones. I have some regular in-ear ones I use for running that I can use for the time being...

I have an overseas trip in a few weeks, so can readily pick something up duty free. I'm just wondering whether it's going to be worth holding off for duty free in Kuala Lumpur or whether I should buy in Australia and claim the tax refund on the way out? Anyone know what the prices are like at KUL? Reasonable? Or am I better off buying from JB Hi-Fi or something and getting the refund?

I'm probably looking at the Bose QC range if it matters any.

Appreciate any input!

 

[markis10]

Anyone know what the prices are like at KUL? Reasonable? Or am I better off buying from JB Hi-Fi or something and getting the refund?

I'm probably looking at the Bose QC range if it matters any.

Appreciate any input!

A quick comparison:

Bose Quiet Comfort 15 Headphone Prices - Compare & Buy in Malaysia | Price Me

Thats $385 AUD. Myer are $399, pick up $400 of Myer Gift cards from the RAC for $380, claim the GST back which will reduce the net price to circa $340.

 

[Boogs]

I just picked up some QC15's from DWInternational' website (HK) for $315+$9 Amex cc charge. Delivered in 2 business days!! Well impressed. I'd read a few bad reviews about DWI but they performed well for me.

 

[Deleted member 29185]

Need you to do the test now on QC20's please!

Really? About the only things I wish to intentionally shove down my ear canals are toothpicks when I'm subjected to Justin Bieber drone :shock:.

For most normal times, over ears for me, are the only way to go (with a decided preference for loud Pink Floyd ).

 

[JessicaTam]

Really? About the only things I wish to intentionally shove down my ear canals are toothpicks when I'm subjected to Justin Bieber drone :shock:.

For most normal times, over ears for me, are the only way to go (with a decided preference for loud Pink Floyd ).

Is there any other way?

 

[Deleted member 29185]

Is there any other way?

Ah, we have some quality time looming I see!

 

[PLANT]

I have fairly new QC15's but the heat from the muffs....size, batteries...
Anyway looking at buying the QC20's tomorrow.....less space to storage....but how long will the LIFE span of lithium battery last?
I could not find the MYer card access via RAC
I rang JBHIFI and bang $350AU....Bose matched it.....I then will use 5% off JBHIFI Egift cards(paid via Debit card) to pay for them $332.50 then TRS(divide $350 by 11) at airport within 60 days and don't need box right?
Total $300.69AU

Or as going to the states do I try and buy and have delivered via EBAY to accom?
I found that my ebay account does not show those listed "buy now" over there but my Android ebay app shows them?
Chatted to EBAY and informed that because they dont ship to Australia wont show on PC but to ask seller to exempt shipping and will show as seller on PC. Probably looking at $283AU if I actually got delivered to US address that will be staying......not confident so got them here.

Update: I went down to collect them and as I pulled out Egiftcard 1x $100 and a 1x $250 asked if I could get them cheaper.....Candice comes back with I can do them for $345....did not ask for cash price over phone doh doh doh!
Probably had more as thinking I was paying credit card?
Anyways is this going to be an issue: The receipt has total $345 but the GST is $31.36?
Will this effect TRS return?

Now I need to move $5 left on card...but have thought an idea for work to get the cash in pocket.!

 

[Deleted member 29185]

I have fairly new QC15's but the heat from the muffs....size, batteries...
Anyway looking at buying the QC20's tomorrow.....less space to storage....but how long will the LIFE span of lithium battery last?
I could not find the MYer card access via RAC
I rang JBHIFI and bang $350AU....Bose matched it.....I then will use 5% off JBHIFI Egift cards(paid via Debit card) to pay for them $332.50 then TRS at airport within 30 days and don't need box right?
Total $297.50AU

Or as going to the states do I try and buy and have delivered via EBAY to accom?
I found that my ebay account does not show those listed "buy now" over there but my Android ebay app shows them?

I'm in an absolute quandry! I know I want over ears, but I'm really unsure which ones. I was sold on the Parrot Ziks but reviews rate two problems which I don't believe should be a problem with $500 headphones....1) short battery life, 2) cough sound when on wire.

I'm not totally put off, as the most of the listening time will be short duration bluetooth enabled, but I'm at a loss as to how bluetooth can possibly be better than wire with quality gear.

 

[PLANT]

First impressions QC20's....the battery thing on the end is lighter than I thought....bout the weight of a pencil rubber and feels like rubber plastic not metal(will need to use rubber band to keep next to back of phone.
I have only put the default plugs in\over\places near ear and mmmmmm do I want them there for 4 hrs?
There is now a clip to hold to top and they have placed the "Noise cancel off\pause button up so high as it also can be used for voice calls.
The cord seems strong\durable and nice length...maybe longer the better(never have too much?)
I switched on and green light.
2 instruction books that a quite thick....one long narrow page is in english?
Charging for 2hrs as instructed.....an orange light blinks.
So lets see if the noise cancel battery lasts 3 years????

 

[JessicaTam]

First impressions QC20's....the battery thing on the end is lighter than I thought....bout the weight of a pencil rubber and feels like rubber plastic not metal(will need to use rubber band to keep next to back of phone.
I have only put the default plugs in\over\places near ear and mmmmmm do I want them there for 4 hrs?
There is now a clip to hold to top and they have placed the "Noise cancel off\pause button up so high as it also can be used for voice calls.
The cord seems strong\durable and nice length...maybe longer the better(never have too much?)
I switched on and green light.
2 instruction books that a quite thick....one long narrow page is in english?
Charging for 2hrs as instructed.....an orange light blinks.
So lets see if the noise cancel battery lasts 3 years????

I look forward to your follow up review in 2016.

 

[DC3]

... Anyways is this going to be an issue: The receipt has total $345 but the GST is $31.36?
Will this effect TRS return? ...

$345.00 ÷ 11 = $31.36 GST exactly.

 

[NFF]

Addicted to Audio in Melbourne has a good range of headphones to listen to. Give them a call or visit their website.

 

[Rox]

I was at a function last night where the band was good but unnecessarily loud.
I have always hated excessively loud music particularly coming from a family where deafness in old age is common, and I need my hearing for my work, so I have become less willing to tolerate it. I also have a friend who works in OHS at factory worksites, who points out that those noise levels would not be legal at her workplace.
Which means you sit outside with the smokers (ugh) or go home.
So, I was wondering, would a discreet pair of noise cancelling earphones do the trick?
Has anybody tried this?