psychoacoustics, how do we determine distance?

thadman
10+ year member

CarAudio.com Elite
Simply put, how does the brain process the distance of a source of sound?

Does it rely on the physical difference of arrival times between the direct wave and the reflected waves or does it interpret the comb filtering effects as they sum and process the perceived difference? Could we fool the brain with homogeneous absorption across a given bandwidth? Lets say an absorption coefficient of .5, which translate to 6dB. For every doubling of distance we lose 6dB, so having a panel with an absorption coefficient of .5 behind the speaker could effectively double the perceived distance or halve the required distance from the wall.

Just curious

 
stop pondering and get your hands dirty and test it yourself... You learn from reading AND trying.... Oh wait reading and theorizing is enough for you //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

 
stop pondering and get your hands dirty and test it yourself... You learn from reading AND trying.... Oh wait reading and theorizing is enough for you //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif
Your immaturity is very obnoxious:confused: Please leave this thread if you have nothing intelligent to add.

 
Humans are normally able to hear a variety of sound frequencies, from about 20 Hz to 20 kHz. Our ability to estimate just where the sound is coming from, sound localization, is dependent on both hearing ability of each of the two ears, and the exact quality of the sound. Since each ear lies on an opposite side of the head, a sound will reach the closest ear first, and its amplitude will be larger in that ear.

The shape of the pinna (outer ear) and of the head itself result in frequency-dependent variation in the amount of attenuation that a sound receives as it travels from the sound source to the ear: further this variation depends not only on the azimuthal angle of the source, but also on its elevation. This variation is described as the head-related transfer function, or HRTF. As a result, humans can locate sound both in azimuth and altitude. Most of the brain's ability to localize sound depends on interaural (between ears) intensity differences and interaural temporal or phase differences. In addition, humans can also estimate the distance that a sound comes from, based primarily on how reflections in the environment modify the sound, for example as in room reverberation.

Human echolocation is a technique used by some blind humans to navigate within their environment by listening for echos of click or tap sounds that they emit.

 
Your immaturity is very obnoxious:confused: Please leave this thread if you have nothing intelligent to add.
Whats the point of this thread? are you gonna go out and build it and test it out or just tell people you theorized something and thats how it will work in the real world just cause you say so

 
Whats the point of this thread? are you gonna go out and build it and test it out or just tell people you theorized something and thats how it will work in the real world just cause you say so
Why don't you just fill it up with more pics of your crappy builds, your foolish overpriced purchases, and filthy carpet? ****ing troll. I used to not care about your incessant rambling, but when you invade an intelligent thread with your nonsense, it's time to stfu.

 
Why don't you just fill it up with more pics of your crappy builds, your foolish overpriced purchases, and filthy carpet? ****ing troll. I used to not care about your incessant rambling, but when you invade an intelligent thread with your nonsense, it's time to stfu.
intelligent? HAHAHAHA

copy and pasting things off the net is nothing intelligent //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

overpriced no things you CANT afford yes...//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 
intelligent? HAHAHAHA
copy and pasting things off the net is nothing intelligent //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

overpriced no things you CANT afford yes...//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif
You're stepping the line man, I did not copy and paste things off the internet. If I copied it from somewhere wouldn't I know the answer already? Do you seriously think thats what I do with my time...go on other forums, find intelligent posts, and copy them here so I can look e-smart and make you look stupid? NO, I don't care about you, how many SPL competitions you've competed in, how good you are at making boxes, what your favorite cereal is...I DON'T CARE. I AM HERE TO LEARN. Please leave and GTFO, nobody thinks you're smart, witty, talented or any of that...just really immature. Go ahead and read any of the posts by members other than you in any of our threads and see who agrees with you.

Thanks and have a nice day

 
stop pondering and get your hands dirty and test it yourself... You learn from reading AND trying.... Oh wait reading and theorizing is enough for you //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif
Seriously, what the **** is wrong with you? Do people actually care about you in real life? I can't see how they could if you act like this on a daily basis.
 
You're stepping the line man, I did not copy and paste things off the internet. If I copied it from somewhere wouldn't I know the answer already? Do you seriously think thats what I do with my time...go on other forums, find intelligent posts, and copy them here so I can look e-smart and make you look stupid? NO, I don't care about you, how many SPL competitions you've competed in, how good you are at making boxes, what your favorite cereal is...I DON'T CARE. I AM HERE TO LEARN. Please leave and GTFO, nobody thinks you're smart, witty, talented or any of that...just really immature. Go ahead and read any of the posts by members other than you in any of our threads and see who agrees with you.
Thanks and have a nice day
Let see you who wont even say your name is telling me your a somebody (scratch that your a nobody) and I should listen to what you have to say but people who actually have names and are known call me for advice don't count //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Who are you again? What are you?

 
Seriously, what the **** is wrong with you? Do people actually care about you in real life? I can't see how they could if you act like this on a daily basis.
Well seroiusly if you think about it for a second what I said is true, Why ask if he/she has no plans on building it and testing? or is he/she actually gonna build something this time?

people care about bin ladin so I am not worried //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 
Well seroiusly if you think about it for a second what I said is true, Why ask if he/she has no plans on building it and testing? or is he/she actually gonna build something this time?
people care about bin ladin so I am not worried //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
//content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif He's asking probably the only brilliant question I've ever seen on this forum, and you have to come in and post some useless bullshit to make yourself feel more important? It's a theoretical question, and unless you have full knowledge of the Sabin levels of different materials and how that relates to distance from your ear, why wouldn't you see if someone else knows? I sure as hell would like to know the answer.
 
//content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif He's asking probably the only brilliant question I've ever seen on this forum, and you have to come in and post some useless bullshit to make yourself feel more important? It's a theoretical question, and unless you have full knowledge of the Sabin levels of different materials and how that relates to distance from your ear, why wouldn't you see if someone else knows? I sure as hell would like to know the answer.
Well if its the only brilliant questions you ever seen on this forum what would make you think that anyone would know the answer to it?

 
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thadman

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