tag:blogger.com,1999:blog-5096278891763426276.post2566419698350597758..comments2024-03-13T19:12:58.863+02:00Comments on absorptions: Case study: tinnitus with distortionOona Räisänenhttp://www.blogger.com/profile/08764440174916554983noreply@blogger.comBlogger32125tag:blogger.com,1999:blog-5096278891763426276.post-6401464508998153482020-12-16T14:59:15.143+02:002020-12-16T14:59:15.143+02:00I believe I have a similar type of tinnitus. It i...I believe I have a similar type of tinnitus. It is very low in frequency and does that tone shift thing that you mention. The lowest frequency is around 28Hz and the higher one is ~36Hz, most of the time in the low but alternating to the high regularly and for short intervals. The differences are that it doesn't appear to be correlated with head movements (at least ones I can perceive) and I don't get the distortion that you mention.<br /><br />The thing that bugs me is that it's not obviously tinnitus. The tone is so low and quiet that it sounds like it's external. The other odd thing is that I've only noticed it when I'm home. But I've asked others if they can hear it, tried many recordings and there is just no evidence that it's anything but in my head. I may try something like this to see if I can detect it.<br /><br />Bob Richhttps://www.blogger.com/profile/10624524087291307292noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-33421050059782374872020-07-11T19:53:35.944+03:002020-07-11T19:53:35.944+03:00Sounds familiar. Low-frequency tinnitus that is mo...Sounds familiar. Low-frequency tinnitus that is modulated by jaw movement is sometimes associated with temporomandibular joint dysfunction; see the Vielsmeier references.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-83829830564524624842020-07-10T01:22:38.652+03:002020-07-10T01:22:38.652+03:00I have recently started experiencing a 65Hz drone ...I have recently started experiencing a 65Hz drone in my left ear. I am unsure what triggered it but feel it may have been related to stress. My EMT consultant sent me for an MRI scan after stating that my hearing is exceptional for my age. Fingers Crossed. How have you all coped with it? I have strangely found that clenching my teeth or talking temporarily mutes the tinnitus, do others experience this?<br />Thanks - Ex-Broadcast Audio Engineer. Stemphttps://www.blogger.com/profile/03485468440923696600noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-75373755509860131662019-02-12T04:00:12.703+02:002019-02-12T04:00:12.703+02:00Hello I'm unsure if you're still reading t...Hello I'm unsure if you're still reading this but I wanted to share a very similar (and ongoing) story.<br /><br />I started with the exact same symptoms on 28th December last year after coming from the cinema. That simulated sound you posted, similar to an SSB broadcast is scarily the exact same way I was hearing everything for a week from my right ear. Music was all out-of-tune and hideous as well. <br />Gradually the distortions seemed to encompass only the 150 - 300 Hz interval until only the 240-270 Hz seemed to be the most affected (or it's just my mind playing tricks). Now I have a very low 250 Hz hum (along with other louder ones at the moment: ~800 Hz and ~2480 Hz).<br /><br />One interesting thing in my case is that I think the culprit is TTTS. When in bed my tensor tympanic muscle would start acting up and spasm once or twice every second for hours in the last 2 years (about 1 day per month). Since the distortions it's now been non-stop spasming/rumbling very fast and I even have random ear aches or new tinnitus tones after listening to prolonged sound, no matter the volume (slight hyperacusis)...<br /><br />I said my mind may be playing tricks in assuming I still have distortions, because I focused on the initial differences so much that now I noticed my right ear hears everything at 15 Hz lower than my left in the 100-300 Hz interval and my left ear has -10 dB hearing in the low freqs (125 Hz to 500 Hz). In short, music sounds clearer in my left and people's voices' reverberating low harmonics don't seem so pronounced.<br /><br />If it has been like this since ever and before the 28th Dec I'll never know...<br />I guess I should add that I'm usually under stress and even when I seem to consciously feel de-stressed the same cannot be said of my subconscious (I know it from the dreams I have).<br /><br />We'll see how it pans out... <br />Wishing all the best to you and everyone who arrived here with weird and stressful hearing symptoms.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-85334276283577193302018-11-18T06:33:30.264+02:002018-11-18T06:33:30.264+02:00I have terrible tinnitus and also TMD which predat...I have terrible tinnitus and also TMD which predates the tinnitus. There is definitely some problem with muscles firing.JamaicaJoehttps://www.blogger.com/profile/12488649185331399239noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-30655979993077680582017-08-10T08:07:13.558+03:002017-08-10T08:07:13.558+03:00This is all I found out about the tinnitus, but se...This is all I found out about the tinnitus, but see my next post, <a href="http://www.windytan.com/2015/10/the-microphone-bioamplifier.html" rel="nofollow">The microphone bioamplifier</a> for some EMG measurements. My tinnitus is probably caused by what's called temporomandibular joint dysfunction (TMD).Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-74907387883712019652017-08-08T00:07:17.493+03:002017-08-08T00:07:17.493+03:00Hi Oona,
I have the same thing, however mine is a...Hi Oona,<br /><br />I have the same thing, however mine is at 71Hz and then it will occasionally drop down to 50Hz instead of the higher frequency you have on the recording. I also had a period of a few days where I had the amplitude modulation. Did yours go away? It is driving me mad. I am an acoustic/electrical engineer so I was planning on seeing if I could take measurements of it. Did you get any further on this?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-69918685646789619642017-07-17T23:47:23.395+03:002017-07-17T23:47:23.395+03:00That effect you presented (modulation of voice sam...That effect you presented (modulation of voice sample) is often present when you apply a s**load of dynamic compression (especially wideband) on a voice with low frequency below. But it's quite common in real world without any electronic devices in between. You can experience it on a bus or train - the only condition needed is the sounds need to be relatively loud. And this is why it happens - well - it's dead simple. Ears do apply dynamic range compression. And they apply A LOT of it, which is totally consistent with The Weber-Fechner law. And this is why dB scale is not linear to begin with. No biggy.Anonymoushttps://www.blogger.com/profile/14464780542824374813noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-55406788036803135882016-06-26T11:02:30.815+03:002016-06-26T11:02:30.815+03:00Exactly my experience! 65Hz tinnitus. (But not the...Exactly my experience! 65Hz tinnitus. (But not the frequency shift). Thanks and kiitos from Sthlm for your Case Study! You are very talented.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-37547908978839770702016-03-07T07:44:28.837+02:002016-03-07T07:44:28.837+02:00Wow I just realized I have been able to do that fo...Wow I just realized I have been able to do that for years. My right ear has a bit of a rattle when I do that.Joe Leikhimhttp://www.leikhim.comnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-76683903019258006532016-03-07T07:41:39.362+02:002016-03-07T07:41:39.362+02:00Wow; I had same thought, really this would be Nobe...Wow; I had same thought, really this would be Nobel prize territory. When I was young, my Mother took me with her to meet E.C Kendall at his home because she had thyroid problems and his research helped her.Joe Leikhimhttp://www.leikhim.comnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-45478285499335030672016-03-07T07:38:52.903+02:002016-03-07T07:38:52.903+02:00I was returning to your page after a long period o...I was returning to your page after a long period of time and find you are doing research on tinnitus, reading same articles I have. If you can crack the code of what causes and cures this malady you will get a Nobel prize for sure. I find that none of my doctors have a clue as to the cause. In my case, I started out when young being able to hear the 15,750 Hz horizontal flyback transformer in US (NTSC) televisions. Now decades later my hearing stops at less than 8500 Hz and I can hear a perpetual 12 KHz tone in both ears modulated somewhat by my heart beat. I expect that it is the result of years of listening to punk rock music in my headphones and at concerts. I wish it would go away. I hope you can solve it. A thought, if it is objective source, could some sort of noise cancelling headphones be used?Joe Leikhimhttp://www.leikhim.comnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-57150055577444701222016-02-23T12:36:20.284+02:002016-02-23T12:36:20.284+02:00Yes, I think I should have shorted the other chann...Yes, I think I should have shorted the other channel instead of disconnecting the ring, to get a better signal.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-30352236457683579562016-02-23T11:05:45.475+02:002016-02-23T11:05:45.475+02:00Those combo jacks will take an unbalanced input as...Those combo jacks will take an unbalanced input as you describe IFF you use a mono (TS) quarter-inch plug that'll short the ring and sleeve contacts in the jack. If you use a TRS plug the input is balanced (tip and ring, with sleeve ground). Just where did you use cellophane tape again? Leaving one side of a balanced input open isn't a good idea even if it seems to work.An old fart engineerhttps://www.blogger.com/profile/04703741815349810550noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-43775671593778279792015-11-01T10:49:37.970+02:002015-11-01T10:49:37.970+02:00If EMG is not effective, you could try laser inter...If EMG is not effective, you could try laser interferometry of the Membrana tympani to see if the frequency is mechanically present. Probably a bit of a challenge, but quite sensitive.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-68516184391823142742015-10-08T00:04:06.129+03:002015-10-08T00:04:06.129+03:00Hi! Thanks for the tip. The Xenyx 302 has a XLR/¼&...Hi! Thanks for the tip. The Xenyx 302 has a XLR/¼" combo connector that accepts unbalanced mic input via ¼" jack, such as I used here.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-54965439024642335452015-10-07T23:54:54.086+03:002015-10-07T23:54:54.086+03:00hello Oona. the input stage for the TRS input does...hello Oona. the input stage for the TRS input does not get the signal right. the earplug that is functioning as dynamic microphone will only put out an unbalanced signal and the signalstage in your xenyx does want a balanced signal. to get the signalstage working correct you have to terminate(short-Circuit)pin 2 to pin 1. this will not make the signal to go balanced. but it will turn off CMRR that filters out signals with same polarity on pin 2 & 3 or signal present on only one signal pin 2 or 3 :) Anonymoushttps://www.blogger.com/profile/10340049137729894573noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-13087470855163504412015-07-20T21:11:10.458+03:002015-07-20T21:11:10.458+03:00Very interesting, kindly keep digging further, do ...Very interesting, kindly keep digging further, do not stop until you have a cure for tinnitus. I'm sure you'll get a Nobel or something.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-55207453329933839852015-07-12T23:27:04.839+03:002015-07-12T23:27:04.839+03:00very familiar: chewing gum was the first thing I d...very familiar: chewing gum was the first thing I discovered to quit using. Actually I performed during the World Music Contest in 2009 by living a full day on a liquid diet (the noises went away during night and I didn't want the risk to have the noise interfere with our Marching bands performance. With success: we became world 3rd during the marching contest there).Anonymoushttps://www.blogger.com/profile/04244706419710554421noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-48114247819198630972015-07-12T09:54:29.066+03:002015-07-12T09:54:29.066+03:00Good observation. I also have some long-time stimm...Good observation. I also have some long-time stimming habits involving the muscles of the head.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-22488782190799064122015-07-12T00:22:59.400+03:002015-07-12T00:22:59.400+03:00Thank you for that interesting summary. I tried to...Thank you for that interesting summary. I tried to find out the source of my (high pitched) tinnitus as well, with little (scientific) luck. I've narrowed it down to the TMJ/trigeminus. Being a computer scientist myself I noticed I picked up some bad habits when I'm working on problem which all include "mouth" habits, on a wide range from sucking in air, building up pressure with my tongue, biting my lips, and chewing (pray that there are no snacks near me when that habit kicks in). It's a subconscious reaction that appears to balance off thoughtwork in the same way some piano players don't know what their facial muscles are doing when they're in the zone.<br /><br />Unfortunately this means the more problem quality time I spend on the computer (which I really like to do), the louder my tinnitus will get. As I've been busy travelling the last two weeks, my tinnitus went down. The last couple of days it came back and I noticed that I only changed one thing: buy some chewing gum. So no chewing gum anymore :(<br /><br />Anyway. I was thinking about the frequency phenomenon you described. I think I remember when listening to binaural beats of the same frequency for a certain amount of time you may even hear their "negative" after-image which modulates naturally heard sounds in a similar way you described, due to the low frequency.<br /><br />Best<br />Gwen3Anonymoushttps://www.blogger.com/profile/04575740732214055706noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-71374264510042076312015-07-11T22:01:59.451+03:002015-07-11T22:01:59.451+03:00I had low frequency noises in my left ear that has...I had low frequency noises in my left ear that has like 60 dBA air hearing loss due to radical surgery, especially after having chewed for a long time. It took more than 6 months to figure out the cause. A prolonged but virtually invisible pharyngitis occasionally making the already thin estachian tube to block combined with pressure build up in the inner ear and apparently still well functioning bone hearing to pick up resonance because the high pressure chamber could resonate easier as the artificial eardrum would now be under tension. A cure with antibiotics solved the problem. <br /><br />The first hospital I checked wanted to do inner ear surgery after an initial CAT scan of the inner ear. I was really glad I declined and had a university hospital do further inspection. It took long, but I'm noise free now. <br /><br />Keep your research going and I think you'll eventually find the exact cause hopefully together with a remedy. Good luck. Anonymoushttps://www.blogger.com/profile/04244706419710554421noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-38480645531031498412015-07-11T21:50:46.057+03:002015-07-11T21:50:46.057+03:00Could be. Though they seem to be usually described...Could be. Though they seem to be usually described as "knocks" or "thumps", i.e. instantaneous sounds with no distinct frequency.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-65077009929404988332015-07-11T21:48:46.800+03:002015-07-11T21:48:46.800+03:00Yes, this will inevitably happen :)Yes, this will inevitably happen :)Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-52180163806131799022015-07-11T20:44:11.892+03:002015-07-11T20:44:11.892+03:00If it is of myogenic origin, it would produce soun...If it is of myogenic origin, it would produce sound waves in the tissue, and, due to impedance mismatch, much less sound in the air. Instead of recording in-ear sound you could try electromyography. Muscle contraction produces really strong electrical signals, which can be picked up on the skin. Technically, this is probably easy: you required some electrodes, contact gel, a pre-amp, and a sound-card, I guess. Try Electrocardiography first to in order to practice. Problems will be electrical shielding and contractions of other muscles.Anonymousnoreply@blogger.com