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I have my pc connected through a Arcam Amplifier and through a pair of B&W DM630 speakers and i can hear up to 20 , Shell can only hear up to 15 which is strange as women should on average be able to hear higher frequencies,

Rob Star Entertainments
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I have my pc connected through a Arcam Amplifier and through a pair of B&W DM630 speakers and i can hear up to 20 , Shell can only hear up to 15 which is strange as women should on average be able to hear higher frequencies,

 

 

No Rob- Women can CREATE higher frequencies... Remembers the "You've done WHAT?!" yell :Thumbup:

They are normally more sensitive to LOWER frequencies, like us gently closing the front door at 3am from a night out... lol

 

 

I got all techy - the site is using 192Kbps MP3 files. Would be interested to re-create using 96Khz WAV files with a decent(ish) sine wave.

 

I personally wouldn't trust an MP3 file to re-create these frequencies.

 

 

No Rob- Women can CREATE higher frequencies... Remembers the "You've done WHAT?!" yell :Thumbup:

They are normally more sensitive to LOWER frequencies, like us gently closing the front door at 3am from a night out... lol

I got all techy - the site is using 192Kbps MP3 files. Would be interested to re-create using 96Khz WAV files with a decent(ish) sine wave.

 

I personally wouldn't trust an MP3 file to re-create these frequencies.

 

 

Just because I'm bored..

http://www.dancesoundsdisco.co.uk/hearing_test/index.htm

 

Uses 96Khz WAV files with 10-22Khz Sine waves (created using Audacity).

 

I can just about hear 18Khz when using Headphones - nothing through laptop speakers.

Lots of background noise, so suspect soundcard of laptop isn't that hot!

 

Jason

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Uses 96Khz WAV files with 10-22Khz Sine waves (created using Audacity).

 

I can just about hear 18Khz when using Headphones - nothing through laptop speakers.

Lots of background noise, so suspect soundcard of laptop isn't that hot!

 

Jason

 

Using the original one... upto 16....

 

Using jasons one.... upto 18 :)

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Using the original one... upto 16....

 

Using jasons one.... upto 18 :)

 

Young whipper-snapper :-)

 

Mine should be more accurate, but I really don't know how good the typical audio response of a Laptop is - but this effects everyone!

 

The original was 192Kbps, at a sample rate of 44.1Khz. At this sampling rate, you'll get a Max frequency reproduction of 22.05Khz (google nyquist..)- and this is a square wave only, and assumes the MP3 conversion doesn't decide to mess with the content too much.

 

Go to 96Khz WAV/PCM, and you get about 4 samples over a 22Khz tone - so a sine wave is a bit more possible.

I suspect this is why some people prefer vinyl, its inherently analogue.

 

 

It would be interesting to run a low-pass filter over a high quality WAV (CD Rip), with the low pass set to 18Khz (or the limit of my hearing)

I'm very sure you would notice a difference between that and the original- even though you think you can't hear about 18Khz.. I suspect you may not hear any sound, but those frequencies and beyond are removed, it would be noticeable.

 

 

What would be good, would be a live FFT (spectrum analyser), as you play these.

Years ago, I developed a system for the National Physical Labs were they could position a microphone in an anechoic chamber (i.e. sound proof room - world class in this case).

I think the idea was to calibrate audio standards.

 

As each venue has its own resonant frequencies - even varying with speaker positioning, a nice bit of kit for helping tweak EQ would be great.

These do exist - I think the Bose L1 (with sound module?) can do this?

Otherwise, a good spectrum analyser with a decent EQ (16 or 32 band) with a noise generator (that covers all audio frequencies would allow us to tweak the system to suit - pretty neat if no guests are in the room...

 

Jas

 

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....my eyesight isn't what is was

 

I really can't comment on how that happens! :joe:

 

Press CTRL and + to enlarge CTRL and - to shrink and CTRL and = to reset the font size on the browser.

I am well overdue an eye test, and some sites really make me sqint.

Jason

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  • 4 months later...

I can't hear anything, ARGHHHHHHHHHH its Paul Kaye all over again :joe:

 

I stopped being a teenager in 1968

 

I wouldn't admit that if I were you, it only serves as a reminder to you, that you are closer to being a pensioner than a teenager. :devil:

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I wouldn't admit that if I were you, it only serves as a reminder to you, that you are closer to being a pensioner than a teenager. :devil:

 

 

"A pensioner"? That's someone who has given up work isn't it (at any age)?

 

I don't expect to ever be one.

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with my sennheiser hd 25's i can get all the way up to 18k then from there on i can only feel it in my ears... like an inner pressure in my ears... weird! But my cheap sony in ear buds wont play over 12k...

 

tests like this are rather random and shouldnt be used as a gauge in your hearing coz thats what your doctor or hearing specialist is for and has the right kit for the job!

 

here's another link that seems a little more calibrated with their source test sounds, not so sure mp3 is a good basis... apart from that you still need a decent sound card, headphones, and correct db setting to be a true test >

link > http://www.bshaa.com/pages/check_hearing_o...11/default.aspx

 

thats another night of spl's in 129db land ;)

Regards

Matt (mjmac)

www.zeroradio.co.uk

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with my sennheiser hd 25's i can get all the way up to 18k then from there on i can only feel it in my ears... like an inner pressure in my ears... weird! But my cheap sony in ear buds wont play over 12k...

 

tests like this are rather random and shouldnt be used as a gauge in your hearing coz thats what your doctor or hearing specialist is for and has the right kit for the job!

 

here's another link that seems a little more calibrated with their source test sounds, not so sure mp3 is a good basis... apart from that you still need a decent sound card, headphones, and correct db setting to be a true test >

link > http://www.bshaa.com/pages/check_hearing_o...11/default.aspx

 

thats another night of spl's in 129db land ;)

 

Not sure if you've tried my lil test;

http://www.dancesoundsdisco.co.uk/hearing_test/index.htm

 

This using 96Khz samples in un-compressed format (WAV PCM), so should be able to MUCH more accurately reproduce the frequencies for 18Khz with 5 ish sample points per cycle compared to 2 ish for a 44Khz MP3 (providing there are no other MP3 related issues)

I've not really checked against my various PC's, but would also assume the output stages will vary with their response, so the web based checks are pretty much only good for a bit of fun..

 

You are right thou, getting an expert to check your hearing regularly is important.

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