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Post by dsonyay on May 27, 2019 21:48:46 GMT -5
Are there any music players that can take a song and block out frequencies below a certain level? Basically play a cd with only frequencies above, let's say, 15k hz passed through. Would I hear anything? Would a young kid?
I ask because I'd like to do an experiment to see how much hearing I've lost... I'd use my young 10 yr old nephew as the second set of ears.
Basically I'd play a CD or file and block out frequencies below 20k, then and work down in stages to about 10k hz.
I'd think it would be kinda fun to see how much more he hears compared to me.
I'm 57 and I know for sure my hearing at about 13k hz is reduced.
So, if there's some software that's open source, I'd love to try this out.
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Post by knucklehead on May 27, 2019 23:50:49 GMT -5
Download Audacity and learn to use it. It can play music, or a single tone of most any freq. Best of all, it's free. Works for Windows, Mac, and my Linux. |
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Post by pedrocols on May 28, 2019 7:06:08 GMT -5
Biology tell us that yes we adults have hearing loss. Unfortunately we still "trust" all these old farts writing reviews when their hearing isn't "accurate."
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Post by ÈlTwo on May 28, 2019 7:24:16 GMT -5
So, you're planning an evil experiment to torture your 10 year old nephew?  |
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Post by chicagorspec on May 28, 2019 7:26:00 GMT -5
Stereophile’s “Test CD” has, among other things, test tones at various frequencies all the way to 20K, I believe.
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Post by dsonyay on May 28, 2019 7:39:45 GMT -5
Download Audacity and learn to use it. It can play music, or a single tone of most any freq. Best of all, it's free. Works for Windows, Mac, and my Linux. was just trying to save a little time and download a player capable of this .. there's a few so I didnt want to waste a lot of time playing around with a bunch of different players to find the one that had this feature. |
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bootman
Emo VIPs 
Typing useless posts on internet forums....
Posts: 9,358
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Post by bootman on May 28, 2019 7:43:38 GMT -5
Maybe another medium might make this test easier?
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Post by garbulky on May 28, 2019 9:21:59 GMT -5
Maybe another medium might make this test easier? This is what you need right here. Forget the CD. |
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Post by dsonyay on May 28, 2019 9:23:20 GMT -5
Ok .. got it.
Downloaded Audacity... Loaded a song.
Set hi-pass filter to 5000hz.. asks to select a roll-off. Not sure what to select.. if I choose 6db I hear a lot.. if I choose 48db I hear even less.
If I set hi pass to 12000hz.. I hear nothing at 48db roll off, but quite a bit bit at 6db.
Roll choices are.. 6 12 24 36 and 48 db.
I'm guessing roll off has to do with how sharp or dramatic a process it uses to cut out the freq below the hi pass freq?
Basically.. I think I'm pretty deaf. LoL
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Post by dsonyay on May 28, 2019 9:25:30 GMT -5
Maybe another medium might make this test easier? This is what you need right here. Forget the CD. Yes... I guess I was trying to get an affect it had to a song playing. .. how much music in a file I was not hearing. |
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Post by dsonyay on May 28, 2019 9:32:56 GMT -5
Maybe another medium might make this test easier? This is what you need right here. Forget the CD. That was cool .. left ear about 68 yrs old Right ear. 42. I'm 57 |
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Post by dsonyay on May 28, 2019 9:33:15 GMT -5
Maybe another medium might make this test easier? Thanks for posting this!! |
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Post by selind40 on May 28, 2019 9:44:48 GMT -5
Holy crap.....67 year old ears, I'm 53. I guess 25 years around C-130's has taken it's toll.  |
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Post by garbulky on May 28, 2019 10:01:36 GMT -5
Ok .. got it. Downloaded Audacity... Loaded a song. Set hi-pass filter to 5000hz.. asks to select a roll-off. Not sure what to select.. if I choose 6db I hear a lot.. if I choose 48db I hear even less. If I set hi pass to 12000hz.. I hear nothing at 48db roll off, but quite a bit bit at 6db. Roll choices are.. 6 12 24 36 and 48 db. I'm guessing roll off has to do with how sharp or dramatic a process it uses to cut out the freq below the hi pass freq? Basically.. I think I'm pretty deaf. LoL Yes so if you are hearing less at 48 db that's what you want - it shows that your ears were hearing it before and when the roll off happened, it noticed that the frequencies were missing. If you are hearing the same amount, it means your ears are not capable of noticing the difference. There isn't a whole lot of musical information at higher levels. |
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Post by ÈlTwo on May 28, 2019 10:25:17 GMT -5
Right ear 45, left 52. My ears are younger than I am, but, then again, they have hair and my head doesn't.  |
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Post by knucklehead on May 28, 2019 10:27:19 GMT -5
Biology tell us that yes we adults have hearing loss. Unfortunately we still "trust" all these old farts writing reviews when their hearing isn't "accurate." Most music resides in the 30-10khz range. But yeah, I've often thought about that too. When I was young I was tested by the USN, I had hearing into the 19khz range. I've never heard any music that strikes a note that high though. |
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Post by dsonyay on May 28, 2019 10:35:10 GMT -5
Right ear 45, left 52. My ears are younger than I am, but, then again, they have hair and my head doesn't. Hahahahaha.. good one |
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KeithL
Administrator 
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Post by KeithL on May 28, 2019 10:36:23 GMT -5
When you set a high-pass filter you get to pick a frequency and a rate of rolloff below that frequency. Unfortunately, the way that filters work in real life is going to make it a bit tricky to actually do what you want. First off, those roll off numbers are in dB/octave. Second, the "cutoff frequency" is defined a little differently depending on the TYPE of filter shape you choose (there are various ones).
So, for example, with a typical filter, if you set a high-pass filter at 12 kHz @ 12 dB/octave the output will be..... 0 dB at 20 kHz 0 dB at 18 kHz 0 dB at 16 kHz -1 dB at 14 kHz -3 dB at 12 kHz ("cutoff")
-15 dB at 6 kHz (1 octave below cutoff)
-27 dB at 3 kHz (2 octaves below cutoff) Note that the response significantly above cutoff is flat... And, at cutoff, it has started to drop by a few dB... Then, well below cutoff, it drops at the specified 12 dB/octave...
HOWEVER, different types of filters have slightly different shapes, and some may even have a slight boost right below cutoff... In your case, with a "48 dB/octave maximally flat filter", the response will be pretty flat down to 12 kHz, and drop sharply below that. HOWEVER, by choosing a gentle 6 dB/octave filter", not only will it drop more gradually below 12 kHz, but, since the whole curve is more gradual, it may also start to roll off a little sooner above that. (And a difference of a few dB inside the range of frequencies you can still hear may make a more obvious difference than what's happening outside of that range.) As someone else already noted.... to test hearing you're better off with using separate individual frequency test tones.
You also have to be very careful about what source and player you use. Different sources may have their own limitations - and, for example, a YouTube video may be limited, or the player you're using could be limited.... And your sound card, or your computer speakers, could ALSO be limited... (So, if you can hear something, you're cool.... but, if you can't hear it, it might actually not be there to be heard...)
Ok .. got it. Downloaded Audacity... Loaded a song. Set hi-pass filter to 5000hz.. asks to select a roll-off. Not sure what to select.. if I choose 6db I hear a lot.. if I choose 48db I hear even less. If I set hi pass to 12000hz.. I hear nothing at 48db roll off, but quite a bit bit at 6db. Roll choices are.. 6 12 24 36 and 48 db. I'm guessing roll off has to do with how sharp or dramatic a process it uses to cut out the freq below the hi pass freq? Basically.. I think I'm pretty deaf. LoL |
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Post by dsonyay on May 28, 2019 10:42:26 GMT -5
Ok .. got it. Downloaded Audacity... Loaded a song. Set hi-pass filter to 5000hz.. asks to select a roll-off. Not sure what to select.. if I choose 6db I hear a lot.. if I choose 48db I hear even less. If I set hi pass to 12000hz.. I hear nothing at 48db roll off, but quite a bit bit at 6db. Roll choices are.. 6 12 24 36 and 48 db. I'm guessing roll off has to do with how sharp or dramatic a process it uses to cut out the freq below the hi pass freq? Basically.. I think I'm pretty deaf. LoL There isn't a whole lot of musical information at higher levels. Yes.. I noticed that.. when I bring up a spectrum it looks like there is very little at the highest freqs.. which I guess is a good thing for old ears. |
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KeithL
Administrator
Posts: 10,256
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Post by KeithL on May 28, 2019 10:46:36 GMT -5
As a broad generalization, music PLAYERS are NOT going to have that feature... Most players have equalization, which lets you boost or cut a range of frequencies, but don't have a way to set a high-cut or low-cut filter...It just isn't something most people want to do in a music player.
If anything, some vintage preamps had a high-cut filter that only worked at high frequencies to remove radio station or tape hiss... And another low-cut filter that worked at super-low frequencies for turntable rumble...
For a program with that feature you're going to want an EDITING program... Audacity is an editing program (editing programs will also play files)...
Download Audacity and learn to use it. It can play music, or a single tone of most any freq. Best of all, it's free. Works for Windows, Mac, and my Linux. was just trying to save a little time and download a player capable of this .. there's a few so I didnt want to waste a lot of time playing around with a bunch of different players to find the one that had this feature. |
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