Why can’t we hear what’s going on inside our bodies?

r/

We don’t hear our blood pumping through our arteries/veins, our heart beating, our colon digesting. Just to name a few.
EDIT: Thank you for all your responses. I’m going to start listening more closely.

Comments

  1. Royal_Annek Avatar

    We absolutely can. Just find a really quiet room.

  2. Meewol Avatar

    We often can but our brain tunes a lot of it out.

    Not every function is loud enough to be heard, as well.

  3. brock_lee Avatar

    My wife would beg to differ.

  4. FunOptimal7980 Avatar

    You can hear some of it if you cover your ears. Your ears obviously point outwards though, so that’s what they pick up more.

  5. MrWedge18 Avatar

    We also don’t see the nerves and blood vessels in front of our retinas. The brain knows to filter it out.

  6. MachinistOfSorts Avatar

    “With no audible background noise to cover it up, visitors report hearing the sound of blood pumping in their heads or moving through their veins, according to Caity Weaver of the New York Times Magazine. Or, as Casey Darnell writes for the Star Tribune, you can even hear the sound of your eyelids shutting upon blinking.”

    https://www.smithsonianmag.com/smart-news/earths-quietest-room-you-can-hear-yourself-blink-180948160/

    Pretty neat stuff!

  7. virtual_human Avatar

    I can hear my pulse.

  8. Callec254 Avatar

    At one point, I could. It was a whistling sound in time with my pulse. It got worse when I laid down to sleep. I now know this is referred to as “pulsatile tinnitus”.

    It turned out to be a big cancer tumor in my gut. Apparently it grew to the point that it was pressing up against some artery, to the point that I could literally hear it in my head. They took the tumor out via surgery and the sound went away overnight.

  9. NationalAsparagus138 Avatar

    Do you mean that the voices arent just in my head? Well, i dont know if that is a relief or more terrifying

  10. kynoble Avatar

    Eat enough beans and spicy stuff and your guts will sound like an old boiler room.

  11. ChibiAlexanda Avatar

    We actually can hear some of what’s going on inside our bodies but most of it is either too quiet, too constant, or filtered out by our brains.

  12. Automatic-Newt-3888 Avatar

    Pulsitile tinnitus is hearing blood pumping in your head/ears. I get that. Also hear my eyes blink at times and hear a lot of bodily movements but I am also hyper aware of my skin and what it’s feeling at all times and am autistic, and can hear electricity in walls etc. So yeah, some of us just can’t ignore the things we are meant to tune out.

  13. PleaseDontBanMe82 Avatar

    Because of all the ambient noise around you.

    If all that was silent, you’d hear your blood flowing.

  14. JustAberrant Avatar

    You can, it’s just drowned out by the relatively loud background noise we’re usually exposed to.

    If you ever get a chance to visit a acoustic anechoic chamber (basically a very sound dampened space) it’s worth doing, but be prepared to feel very uncomfortable.

  15. ZombieBreath13 Avatar

    I can, I have sensory issues and sensitive ears, it’s maddening. Be glad that your ears tune 99% of it out. If you go somewhere very quiet, like a deprivation tank, you will hear it much better.

  16. muchadoaboutsodall Avatar

    Trust me. You don’t realise how much noise your heart is making until it suddenly stops. Gives a new meaning to ‘deafening silence’.

  17. RelativeTangerine757 Avatar

    Oh some of us can, and it was really nice when I couldn’t and wasn’t as aware of every ache and pain I’m constantly feeling

  18. Terrible-Mix-1787 Avatar

    I got tinnitus so I get this buzzing when it’s quiet. 😭

    This is why you don’t listen to music too loudly with headphones.

  19. Terrible-Mix-1787 Avatar

    I get this buzzing in my ears when it’s quiet, this is why you don’t listen to music loudly.

    Found out it’s called Tinnitus.

  20. Choccimilkncookie Avatar

    Technically we can. Sort of like how we can feel the chair under our butt.

    Basically when we have a constant stimulus we start to ignore it. Its how people can live close to roads, trains, etc and be ok with it. Its why we dont constantly feel our shoes and clothes (unless theyre uncomfortable)

  21. Classic_Field7400 Avatar

    It just wouldn’t be bearable or very practical. Imagine hearing every cell move, every reaction, every change. Any organism that could would be severely impaired compared to an organism that couldn’t, making genes for hearing what goes on inside our bodies much less likely to pass on.

  22. sentient_saw Avatar

    I have pulsatile tinnitus, which comes from the sound of blood in your head. For me it comes through as an uncomfortable pulsing (subdued) roar. Others describe it as a “whooshing” sound.

    It really sucks when it’s occurring. It can cause sleep issues and can distract when listening to someone talk.

  23. vivp13 Avatar

    when i drink something on an empty stomach i can sometimes hear it sloshing about inside and I think it’s so funny.

  24. iLikeBBandICNL Avatar

    We do, but our brains choose to ignore it.

    Some things you do hear. Especially when older. 🥲

  25. songmage Avatar

    We can, but because we’re mostly water, things will sound like it’s moving through water, like if you knock on your skull, it won’t sound different from if you heard some knocking in the water while swimming.

    So for starters, evolution would weed-out anything that made noise while trying to stay hidden, so probably significant consideration was made to be as quiet as possible, but we probably also have some amount of built-in mechanism that prevents us from hearing our own heartbeats, as there’s no reason to hear them.

    Even if we eliminate sound specifically, our timed access to oxygen should theoretically make us feel different between hearbeats on some level. That’s not the case either because our heartbeats are too fast, or because our brains automatically filter that kind of stuff out.

  26. Axel_Dino Avatar

    We can, but our brains tune it out cause the noises are always there. Like if your refrigerator hums, you eventually don’t hear the humming, but someone whose fridge is totally silent could walk into your house and notice it right away

  27. South_Hedgehog_7564 Avatar

    I often hear my stomach rattling.

  28. Ella8888 Avatar

    It would be too overwhelming for us. Like standing in a hurricane. That new Twisters movie is very good.

  29. No-Celebration3097 Avatar

    Farts are the result of what’s going on inside you. lol.

  30. SingerFirm1090 Avatar

    Yes we can, if not why do doctors carry stethoscopes?

  31. VisualHuckleberry542 Avatar

    Be grateful if you can’t

  32. PecanSandoodle Avatar

    You can, you also dont notice your nose even tho its always like…right there in front of your eyes because your brain is your editor. Your brain editor also edits out memories of boring and repetative tasks.

  33. minamooshie Avatar

    I remember learning about rooms with complete sound deadening treatment, where people would go insane because they could hear all of their blood flowing past their eardrums and other bodily functions. Seems horrible

  34. senor61 Avatar

    Wrong frequency

  35. elalphalavaron Avatar

    They’re just Not loud enough in a “normal” environment

  36. Monte_Cristos_Count Avatar

    You can. Your brain tunes it out so it focuses on external noise. There are studies of people going to rooms built to be absolutely silent. The people get a bit crazy because they can hear everything going on inside their body 

  37. MaudesMattress Avatar

    I’m in my 40s and I wish I could stop hearing all the noises my body is making 🤷‍♀️

  38. daniel_redstone Avatar

    There’s a plot point in Doctor Who where one of the characters realizes she’s dead when she notices that she can no longer hear her heartbeat

  39. OptimusPhillip Avatar

    We actually can hear the blood pumping in our ears, but our brains just tune it out to focus on external sounds.

    As for food digesting, the sound is dampened by the food itself, which absorbs the sound waves and muffles them from our ears. But when our GI tract is empty, the low rumble of our bowel muscles becomes unnamed and audible. This is the source of “stomach growls”.

  40. Mazza_mistake Avatar

    We can sometimes but only when it’s quiet, also if we heard that stuff constantly it would drive people insane

  41. Historical_Volume806 Avatar

    You can technically hear it you just tune it out the same way you don’t notice your nose most of the time.

  42. Lack_of_Plethora Avatar

    I can hear my blood pumping.

  43. xopher_425 Avatar

    We can, but the environment and our brains block it out. I cannot use ear plugs at night, because the noises in my body are louder than the noises outside of it. I can hear the blood rushing through my ears, the squeak of my head rotating on my spine from any tiny movements I make. Sounds odd, but after two days of it I’ve never worn them again. This was many years ago, nad I now use a noise app that is a huge help.

  44. Proper-Photograph-76 Avatar

    ponte unos tapones para los oidos y escucha

  45. No-Clue4432 Avatar

    I have one eye that shakes when I look to far left. I can hear it when it does that. Makes me want to barf

  46. ThesmoothGemminal94 Avatar

    I can actually hear my own heart beating sometimes, like if I’m lying down on my ear I can hear it through my ear

  47. auradrift Avatar

    I don’t think people really know what is to hear our own body. It’s when you can feel slight change and know when you need to relax, or eat healthier, or move.
    Cause for so many years we got those feeling shut. It’s hard to change now. Just step by step learning to hear it again

  48. Own-Ad-9098 Avatar

    Cause it’s quiet in there.

  49. _SpeedyX Avatar

    We can, but our bodies are quite small, so the sounds are generally quieter than the environment we are in. It’s like trying to hear a fly while standing near a taking-off plane.

    If you find a really quiet place, you can hear your blood. And I’m pretty sure you’ve heard your heart beating – if you’ve ever sprinted in your life, you know the feeling. We can also kinda our body digesting – peristaltic sounds can be loud enough to be heard from time to time if you are in a quiet room

  50. D_Doenermann Avatar

    Here’s an other strange fact:

    The Brain is the only organ that can Prozess pain, but also the only organ that can’t feel pain itself, due to its lack of pain Rezeptors. That means, that the thing that only is made out of nerves doesn’t have nerves for pain. But all the other organs with just a little amount of nerves have pain nerves but no nerves to really Prozess Inputs (like the brain does).

  51. not_productive1 Avatar

    Because it would make us insane. We are hardwired to tune out stuff that is in the background all the time.

  52. Ambitious_Hold_5435 Avatar

    I did a biofeedback session once – it was cool. I could hear what was going on in there, including exploding gas bubbles. It makes me wonder what a baby hears in the womb.

  53. kelariy Avatar

    You can. But it’s kind of like seeing your nose, it’s always in your vision but you have to try to see it, or your own body odors, for the most part. It’s always there so your brain just sort of tunes it out.

  54. flugx009 Avatar

    Sometimes I hear static at the back of my neck at the base of my head.

  55. ReySpacefighter Avatar

    Are you quite sure you’re alive? Because it’s very normal to hear all those things.

  56. SteampunkRobin Avatar

    You can, your brain just learns very early on to tune it out. Just like you can always see your nose, but learn to ignore it.

  57. Mrs_Gracie2001 Avatar
  58. Chihro2010 Avatar

    I think we would slowely go insane.

  59. hypothetical_zombie Avatar

    I can hear it all. Digestion, fluid movement, bones & tendons & ligaments creaking and popping. My eyes squeak against my eye sockets. My own eating noises trigger my misophonia 🙁

    As far as superpowers go, it’s miserable.

  60. Lego_Chicken Avatar

    I started hearing some of my bones in my 40’s.

    Not a fan

  61. ciurana Avatar

    You can. Getting into meditation helps. I can hear my pulse, breathing, and some peristaltic movements. Slight wheezing in my lungs when allergy or a cold hit, super early in the course of the situation so that I can correct it.

    Learn to medidate and you’ll be able to hear your body’s sounds. Becoming aware of your heart pumping is super weird at first, then it’s comforting once you get used to it. Transcendental mediation is easy, you will start noticing the sounds after 3-4 into sessions of about 5-min each.

    Cheers!

  62. Silly-Secretary-7808 Avatar

    If I concentrate, I can hear the blood pumping through my ears.

  63. gvccigraves13 Avatar

    Just have a panic attack and you can hear all these things at the same time.

  64. DarkIllusionsMasks Avatar

    I don’t know about you, but other people can hear my colon digesting.

    Just sayin.

  65. lordskulldragon Avatar

    Speak for yourself peasant.

  66. PerspectiveThick3075 Avatar

    Actually, if you exercise and raise your heart rate, you WILL be able to hear your heartbeat, and many people can hear their stomachs digesting a difficult meal, not to mention the audible passing of gas.

  67. LittyForev Avatar

    I’m laying down in a quiet room right now and I can hear my heart beating. If i cup my ear with my hand, I’ll hear my blood running (yes that’s what that sound is). If I’m hungry or I’m digesting I might hear my tummy make bubbling or squishy noises and of course a fart if it the gas crosses the finish line. I can also hear myself breath very loudly and I can even hear when I blink.

  68. shopaholic_lulu7748 Avatar

    I can hear my pulse in my ear sometimes when my blood pressure is high. Drives me nuts.

  69. National_Guitar_9163 Avatar

    i can hear my heartbeat if i close my ears or when im exercising

  70. Jabathewhut Avatar

    For the same reason you don’t see your nose unless you’re looking at it. Your brain tunes it out.

  71. Useful-Fish8194 Avatar

    I don’t know but I am really fucking glad that we can’t

  72. Mrs_Blobcat Avatar

    Every time you swallow you hear a click in your ear.

    I read this on Reddit long, long ago and it still lives rent free in my head. Curses on the person who wrote it.

  73. Wrongbeef Avatar

    It’s perfectly possible, lay down in a bathtub with your ears beneath the surface of the water and listen, you’ll hear more than you want to if you stay long enough 😉

  74. pieceofdriftwood Avatar

    i’ve been wearing earplugs 24/7 for about six years now (sensory processing disorder). my hearing has gotten stronger to make up for it; i can hear the vibrations of my joints creaking, especially my jaw and neck. if i pop a joint in my upper body really good, i can hear it internally and externally 🙂

  75. Winter_Parsley_3798 Avatar

    Ever covered your ears and heard sounds of the sea? That’s the sounds of your hands

  76. SensualEnema Avatar

    And on the same token, why don’t we heard our bodies slosh when we jump?

  77. dependswho Avatar

    It would be overwhelming

  78. EntertainerNo4509 Avatar

    I can hear everything going on. It comes through as ringing in my ears all the time. /s

  79. Beautifulfeary Avatar

    As a kid I used to think I had small men/army marching in my head because I could hear my blood pumping.

  80. SoulGloul Avatar
  81. garyisonion Avatar

    You can. That’s what tinnitus is.

  82. Apprehensive-Age2135 Avatar

    My fiance does. He can even hear when ultrasound techs change the color during an ultrasound. Some people’s hearing is better than others.

  83. Xzeriea Avatar

    Try eating too many pot cookies, and you’ll be able to hear everything.

  84. LummersTheGreat Avatar

    Do you want to go insane because this is how you go insane…

  85. Fellowstrangers Avatar

    Fold one of your ear into a pillow and you can hear a slight sound of your heartbeat.

  86. TangoCharliePDX Avatar

    The skull is somewhat sound insulated from the rest of the body.

    If you lean your ear against your shoulder bones, you can hear your phone vibrating in your hand. Or tap your fingernail on a surface and you can hear it propagate through the bones.

  87. NegotiationWeak1004 Avatar

    You can certainly hear it. Have to make a conscious effort. Like you don’t think about breathing, but it’s not that you ‘cant’ think about breathing .

  88. TangoCharliePDX Avatar

    I can hear a lot of things – joints pop, cartilage squish as I move around, intestines gurgling…

    but the most noteworthy being when bile is released in the morning – my body saying It was time to eat 5 minutes ago. Squiiiiirt!

  89. Jolly-Guard3741 Avatar

    My wife has chronic IBS and I hear way more than I want to.

  90. shilgrod Avatar

    I assume the brain just usually filters it out, like how you can always see your nose

  91. Haematoman Avatar

    I hear my heart beating a lot.. resting heart rate 100+… im toast lol

  92. TimMacPA Avatar

    You can hear it in your ears sometimes.

    You hear your tumyy growl

    You hear a fart work it’s way down your colon

  93. irldani Avatar

    I wish I didnt hear my heart beating LMAO

  94. palm_fronds Avatar

    When I tilt my head back I can hear my eyes moving

  95. boogstn Avatar

    Unfortunately, I hear/feel my heart beating for like 80% of my day. I have some dysautonomia and get heart palpitations on the regular. It also comes with feeling the blood moving sometimes. -0/10 do not recommend 😂

  96. DandyDeputy Avatar

    We actually do hear our bodies sometimes like heartbeat and stomach growls but our brain filters most of it out so we don’t go crazy hearing everything. It’s just like a built in noise cancellation for sanity.

  97. bogpudding Avatar

    When I go to sleep and have anxiety I can absolutely hear my stomach gurgling and twisting itself into knots and my heart is louder than a drum&bass concert in my ears.

  98. ravenous0 Avatar

    I have an artificial valve in my heart, and at night, when I sleep on my left side and it’s absolutely quiet, I can hear blood pumping through it. That’s the key to hearing your own body. Absolute silence.

  99. YouProfessional7538 Avatar

    Being in a place that’s so quiet it almost hurts

  100. schwarzmalerin Avatar

    I injured myself once and there was quite some blood dripping, I was so freaked out in instant like a had 10 cups of coffee, and I could hear a very fast, strong pulse pumping and rushing in my ears. (Everything was fine, I dressed the wound, nothing serious.)

  101. Healthy-Nebula-2069 Avatar

    I hear my blood pumping every night when I lay down for bed. I have trouble sleeping because of it.

  102. MagicInstinct Avatar

    Once when I eat way too many edibles that’s all I heard for like 10 hours. Its was awful

  103. Nathan-Stubblefield Avatar

    My stomach started gurgling after breakfast. I made a recording and it sounded like walruses arguing back and forth. I really don’t need to audio representation of the inner workings.

  104. whateverisstupid Avatar

    There is actually a health condition that causes people to be able to hear inside them….most go crazy because it’s hard to diagnose correctly, and the constant sounds can be hard to deal with long term. It can be corrected sometimes through surgery.

  105. Mr-Xcentric Avatar

    Ha count yourself lucky that you personally can’t. I can feel/hear my heart beat all the time

  106. DaddyDizz_ Avatar

    People with high blood pressure can experience tinnitus when their BP is up. The sound is from the added pressure in the vessels in your auditory system. In lame man’s terms, you can hear your blood pumping when you have high blood pressure. Also, some people with ADHD can experience increased awareness of their internal sounds, which can contribute to a sense of overwhelm

  107. Lampy-Boi Avatar

    Lol I can. But I’m neurodivergent and really receptive to sound. I can’t be in utter silence because I hear the human body/electronics.

  108. Greghole Avatar

    When you hold a seashell or cup to your ear, what do you think you’re hearing?

  109. GeekInSheiksClothing Avatar

    I have sensory-motor OCD. Unless I’m medicated, I can hear and feel stuff going on in my body. I can even hear needles going into my skin, it’s a squeaky sound.

  110. Agile-Entry-5603 Avatar

    When everything is silent and you’re walking is your socks or barefoot, listen closely. You can hear the sound of your feet echoing through your body.

  111. BananaSplittLady Avatar

    I can occasionally hear my pulse/ blood flow/heartrate

  112. That_one_squid_emoji Avatar

    Wait you guys can’t hear that shit!??

  113. PresentationNo8244 Avatar

    My IBS sends its regards…

  114. phantom_gain Avatar

    You can actually. You just tune it out or ambient sounds overwhelm the sounds you are making

  115. Key_Team1192 Avatar

    Superior canal dehiscence can cause a person to hear sounds from inside the body, but most of us have a natural barrier

  116. Nekrosiz Avatar

    Bruh i can literally hear my heartbeat and blood flowing in my ear all the time

    supposedly some condition

  117. TheMule90 Avatar

    Their is one sound that some people don’t wanna hear and that’s cracking your bones.

    I fucking hate the sound of my right knee cracking.

  118. Innuendum Avatar

    Hold a sea shell to your ear and the sound you hear is blood rushing, not the ocean.

    Get a stethoscope and you can hear your heart beating, your intestines working (you don’t hear digestion but motility and its results), air rushing through your trachea etcetera.

  119. corpsecrusherBO3 Avatar

    You can, and if you concentrate enough you can feel vibrations down to your feet when you talk

  120. QuirkyFail5440 Avatar

    I HATE listening to my heart beat. I mean, I’m glad it beats, but I hate hearing it. Every night, I hear it.

  121. Available-Egg-2380 Avatar

    I had stupidly sensitive hearing for most of my life. I could hear my fucking eyelids move when I blinked, could hear the electrical hum from a Tv turning on in the next room. Had to have a box fan on high right by my face every night for most of my life to be able to sleep because someone sighing or coughing QUIETLY in another room would wake me from a dead sleep. It’ll make you insane to actually hear everything going on around you. I’m so happy my hearing is relatively normal now.

  122. yellowistherainbow Avatar

    You don’t? I have to listen to that stuff frequently and I hate it. Trying to sleep is the worst.

  123. whatswestofwesteros Avatar

    I thought we all heard our blood pumping ? My heartbeat becomes a real cacophony during a panic attack.

  124. Longjumping-Basil-74 Avatar

    Because you have layers of muscle, skin and other tissue that sound waves don’t easily propagate through