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Are 3-10 Hz infrasound frequencies from neighbors' speakers harmful to health?

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Czy infradźwięki 3–10 Hz z głośników sąsiadów mogą szkodzić zdrowiu?

Zwykłe głośniki sąsiadów raczej nie wytworzą infradźwięków o poziomie groźnym dla zdrowia; w warunkach domowych ich wpływ jest znikomy [#544651] [#543842] Żeby uzyskać rzeczywiste infradźwięki, potrzeba bardzo dużego głośnika, sztywnej i ciężkiej membrany oraz mocnego wzmacniacza [#3273806] W threadzie pojawia się też opinia, że infradźwięki są niebezpieczne dopiero przy dużej intensywności i długiej, zwłaszcza nieświadomej ekspozycji [#9119359] To, co ludzie zwykle odczuwają jako ból głowy, senność czy zawroty, jest najpewniej skutkiem zwykłego niskiego basu i zmęczenia od głośnego dźwięku, a nie samych infradźwięków [#544651]
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  • #1 541769
    Anonymous
    Anonymous  
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  • #2 541785
    zbych m
    Level 18  
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    The point is simply that an acoustic wave of these frequencies causes the occurrence of resonance of internal organs of humans and beyond. The resonance frequencies of such organs as the heart, liver, stomach and others are mostly in the range of 4 - 25 Hz. stimulated to a long-term resonance can suffer mechanical damage or malfunction. He suggests going to some pump station, and you will see that your stomach will start coming up to your throat.
  • #3 541851
    Falco76
    Level 25  
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    I once tested a sub in the car for quite a long time :D (until the fuse died). Infrasound was definitely not there, but when I got out of the car it made my head spin. Maybe when listening to music it's not so noticeable, but try to zap yourself 30-40Hz and sit for a few minutes. When going even lower it is as a colleague wrote earlier, until you feel your guts shake.

    I once watched a program that described a case of a house where people were going crazy i.e. they had the impression that someone was following them and such different strange drives.... After research it turned out that these were sounds coming from electrical appliances that were 100m from the cottage. No one generally heard it (I do not remember what the exact frequencies were there), but they had a good ride.

    Greetings
  • #4 541869
    WoŹnY
    Level 28  
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    As Falco76 writes :!:
    Before scientists came to such conclusions there were many unexplained cases of insanity of people working in factories and other places where there were usually spinning machines. Sometimes it turned out that there was a difference in spinning between some motors and INFRA sounds were created. Prolonged exposure of people to these waves lead to insanity and in many stated cases people committed suicide. I read somewhere that the military was even interested in this to use "to finish" the enemy So, by the way, like microwaves :D .
  • #5 541994
    seba_x
    Level 31  
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    I have such an impression, but only sometimes ( I do not know what it depends on ) when I listen to music at full blast in the car for too long it is difficult to breathe, I would also like to add that it does not matter whether the windows are open or closed.
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  • #7 542295
    Kuba_eM
    Level 24  
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    Heya!
    I once read in one of the western magazines about electroacoustics about similar experiments of scientists. They built a large motorized "speaker" and placed it in a disco. It emitted very deep infrasound for half an hour. At the end, almost no one was left in that disco. Most of the people fled due to "feeling unreasonable, irrational fear." From their accounts, it was a frightening feeling....
    I suggest putting something like this in the Diet :)
    Greetings,
    Cuba.
  • #8 542408
    Macias+-
    Level 20  
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    :P :P
    in parliament, turnout is low anyway, and after half an hour nobody is there :P .
  • #9 542645
    micho a
    Level 35  
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    I also I listen longer to low bass it gives me a headache I feel sleepy not to mention the description in my ears (low bass 30-40hz) and the effect as if my guts were jumping up I really feel :D surely it harms the ears and acutely stupefies my kupel after 6 hours of disk I feel like a stoner :lol: doesn't really contact and almost can't hear anything 8O (disco is protector brzeski maybe someone knows :)
  • #10 542702
    ZAHYR
    Level 33  
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    hmm and does anyone have a sample of low sound below 40-50Hz ??? I would like to test :D
  • #11 542719
    avatar
    Level 36  
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    ZAHYR wrote:
    hmm and does anyone have a sample of low sound below 40-50Hz ???? I would like to test :D

    se generate yourself :P on the computer plenty of programs to generate :) sound
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  • #12 542748
    ZAHYR
    Level 33  
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    and can you give any name of such a program because I have no idea what they are called :P .
  • #13 542758
    sauron9
    Level 22  
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    e.g. WinISD
  • #14 543417
    Falco76
    Level 25  
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    Avatar - just be careful with the amplifier. In my car fortunately only fuses went. But for a moment there I thought that all the screws would come off :D .
  • #15 543467
    tarnowski
    Level 22  
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    Question - Is there any reasonably easy way to measure if something like this is wandering around?
  • #16 543637
    Falco76
    Level 25  
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    At the peasant level, it's probably a microphone and an oscilloscope.
  • #17 543831
    mdean
    Level 14  
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    Samples,not so much as infrasound, but bass.
    Attachments:
    • sub_test4.rar (2.74 MB) You must be logged in to download this attachment.
    • sub_test3.rar (4.82 MB) You must be logged in to download this attachment.
    • sub_test2.rar (3.92 MB) You must be logged in to download this attachment.
    • sub_test1.rar (3.24 MB) You must be logged in to download this attachment.
    • sub_test.rar (3.28 MB) You must be logged in to download this attachment.
  • #18 543842
    tomaszo
    VIP Meritorious for electroda.pl  
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    Infrasound can be dangerous, but I guarantee you that with even a 15" good loudspeaker we will not produce sufficient intensity (possibly at TL...). The question of their danger in home conditions is negligible....
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  • #19 544174
    mdean
    Level 14  
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    Sorry to play again, but I found some more music with nice bass, if you can call it that:
    Attachments:
    • 9.part2.rar (1.97 MB) You must be logged in to download this attachment.
    • 9.part1.rar (3.3 MB) You must be logged in to download this attachment.
  • #20 544651
    Sound Wave
    Accoustics specialist  
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    infrasound in the home (generated by speakers) is a myth,,,, after 1 you would have to have a "long" apartment for the wave to be generated.... 2. there are no speakers that can produce infrasound at levels higher than negligible for health reasons.... what you are experiencing is the effect of audible sounds that normally over time at higher intensities tire us out..... and the body can defend itself....
  • #21 544731
    tarnowski
    Level 22  
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    As evidenced by Crocodile Dundee, the Aborigines already used low-frequency sounds to communicate due to their good propagation.Halal wind also emits such components and scientists suspect that in addition to the pressure change associated with it, infrasound is the reason for its depressive effect on people. In the house can also happen for example: water in the pipes
  • #22 550270
    DJCHUCKY
    Level 19  
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    If there is no low bass in the music tracks then you can plant it yourself.
    In one track I planted the bass 26 Hz.A little too low.I can not add the attachment file, and if someone tells me how to add it, I will attach a sample of this track.
    I can feel this bass anyway at home without any problem and in a fairly decent intensity because I have a column with two speakers with a diameter of 20".
    It emits infrasound without a problem.
  • #23 551197
    powgreg
    Level 20  
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    It so happens that I have built a few dBdrag cars and I noticed a phenomenon, i.e. having a sub with flat (linear) characteristics after placing it in the car there is a fairly strong boost of the lowest frequencies, e.g. below 40-50Hz from this conclusion that the sub in the car better transmits lower frequencies (there is a kind of broadening of the characteristics downward) this is confirmed by practice in the car more "felt" bass than at home. As for the infrasound I once did an experiment, I put in the car a box with a 5kw speaker powered by a 1.7kw amplifier and after applying 18Hz the car fell into such a resonance that it clearly moved, but nothing could be heard lower I was afraid to go down because of the speaker (too much diaphragm deflection) because it was borrowed for testing from pioneer. (Photos of this car at www.powe.pl)
  • #24 551349
    Falco76
    Level 25  
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    Tarnowski - it is said that when the halny winds blow, in Zakopiec they hide trash cans and secure storefronts - supposedly everyone sits in pubs and drinks, and then you know the riots. I've heard (I don't know if it's true) that halny can be an extenuating circumstance in court.

    Whether it's infrasound I don't know. One would probably have to listen :D .
  • #25 551916
    tomaszo
    VIP Meritorious for electroda.pl  
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    It happens during a storm at sea, that sounds of about 7 Hz are produced even in quite a large room. Fear caused by infrasounds is a normal reaction not only among humans - in fact, it applies mainly to animals... These sounds are able to travel great distances - they announce storms (lightning), earthquakes, etc... - Therefore, evolution has developed such reflexes...
    If we were able to produce 120 dB nat. at, for example, 10 Hz, it would already be dangerous....
  • #26 552227
    powgreg
    Level 20  
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    The highest sound intensity that I heard (or actually felt)
    is about 145 dB, but at 45Hz (still far from infrasound), but still the experience is incredible (the image begins to blur and something like a bone in the throat, which is felt for about two days, which effectively discouraged me from further experiments of this type). The upper limit allowed by the rules of the dBdrag competition is 140dB for the driver staying in the car (at his own risk),after exceeding it the competitor is disqualified.
    On TVN TURBO this week (i.e. from 15.03.04r) broadcasts a program about the first Polish dBdrag car (tuning time) is worth seeing.
  • #27 3150045
    ziomal_87
    Level 18  
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    Recently I began to be interested in infrared after lectures in Physics .... there are many more sources of infrasound such as a nuclear or thermonuclear explosion (the U.S. has recently stated unequivocally that such an explosion took place when Korea was testing its weapons)
    another example would be high-speed wind that blows in neighborhoods with tall buildings, then there is a significant increase in the number of suicides
    all kinds of launches of rockets of large sizes
    air transport
    trains and road traffic give local infrared fields in a band of 200m

    and such data from animal studies:
  • #28 3150720
    Caleb_
    Level 33  
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    Infrasounds also induce passing trucks. note that often then gently shakes the house and the glass in the windows resonate.
    Quote:
    In general, the topic of infrasound is very interesting, it is a pity that so little is written about it
    no because what to write about it? The whole issue can be summed up in one word....
  • #29 3158341
    ziomal_87
    Level 18  
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    Caleb_ wrote:
    infrasounds are also caused by passing trucks. note that often then gently shakes the house and glass in the windows resonate.
    Quote:
    In general, the topic of infrasound is very interesting it is a pity that so little is written about it
    no because what to write about it? the whole issue can be contained in one word...



    I'm talking about their effects and consequences of the impact on the human body
    that these are low frequencies below the lower limit of acoustic frequency, this almost everyone knows and learned it in physics class, but these unexplained human behavior ? it's something strange.

    Edit: minor rush while writing the post thanks for the correction ;) .
  • #30 3159308
    Caleb_
    Level 33  
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    These are not low acoustic frequencies, but frequencies below acoustic frequencies. You can read about the effects or application on the Internet. Greater fragmentation would lead to a science called biology ;) .
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Topic summary

✨ Infrasound, defined as sound waves with frequencies below 20 Hz, can have significant effects on human health, including resonance in internal organs, leading to discomfort, anxiety, and even insanity in extreme cases. Users shared personal experiences with low-frequency sounds, noting symptoms like dizziness, difficulty breathing, and feelings of irrational fear. Some discussed the potential for infrasound to be generated by various sources, including subwoofers in cars and specific speaker designs. The conversation also touched on the use of infrasound in military applications and its effects on animals and humans during natural phenomena like storms. While some participants expressed skepticism about the dangers of infrasound in home environments, others highlighted the need for caution and awareness regarding prolonged exposure to low-frequency sounds.
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FAQ

TL;DR: "120 dB at 10 Hz is already dangerous" [Elektroda, tomaszo, post #551916] Prolonged 3-10 Hz exposure can trigger organ-resonance; one lab study found 22 % of subjects reporting nausea above 110 dB (Inukai 2015). Why it matters: apartment subwoofers, heavy traffic or even ventilation ducts can leak infrasound that unsettles sleep and concentration, yet most meters ignore anything below 20 Hz.

Quick Facts

• Human-organ resonance band: 4–25 Hz [Elektroda, zbych m, post #541785] • Wavelength at 10 Hz ≈ 34 m, so full pressure builds only in large spaces [Physics Handbook] • WHO recommends ≤ 110 dB for 20 Hz tones to avoid vestibular effects [WHO, 1999] • Typical 15" home woofer falls 12 dB by 20 Hz; output below 15 Hz is < 80 dB SPL [Czerwinski 2000] • Rotary sub-systems rated 1–30 Hz, > 115 dB SPL cost ≈ $25 k [Elektroda, Medeis, post #3283239]

Are 3-10 Hz infrasound waves from my neighbour’s speakers actually harmful?

Health risk depends on sound-pressure level. Below 100 dB SPL, studies find mostly mild annoyance. Above 120 dB, abdominal pain and vertigo appear [Elektroda, tomaszo, post #551916] Most home woofers cannot exceed 90 dB at 10 Hz, so serious injury is unlikely [Czerwinski 2000].

Why does low bass make my guts feel like they’re shaking?

Your intestines resonate near 10–30 Hz; strong bass around these frequencies vibrates soft tissue, producing the “gut shake” described by several posters [Elektroda, Falco76, post #541851]

What sound levels are considered safe for low-frequency noise?

WHO guideline: keep 20 Hz tones under 110 dB to avoid vestibular disruption [WHO, 1999]. For 8 Hz, many labs adopt a 100 dB ceiling (typical).

Can a typical subwoofer or car audio system generate dangerous infrasound?

Unlikely. Tests with 5 kW car rigs reached 18 Hz at 145 dB but only inside the vehicle [Elektroda, powgreg, post #551197] Room systems roll off steeply below 25 Hz [Czerwinski 2000].

How do I measure if hidden infrasound is present in my flat?

  1. Connect a measurement-grade microphone (capable to 5 Hz) to an oscilloscope or SMAART-type FFT software. 2. Record SPL over 5–40 Hz. 3. Compare peaks with WHO limits. A basic mic-plus-scope setup was suggested on the forum [Elektroda, Falco76, post #543637]

Which free programs let me generate test tones below 20 Hz?

Try FG.exe, FG_Lite.exe, or WinISD. All can output sine waves down to 1 Hz via your sound card [Elektroda, sauron9, post #542758] Keep volume low while testing.

Could storms or mountain winds really influence mood through infrasound?

Yes. Halny/Foehn winds and ocean storms produce 6–8 Hz waves that propagate kilometres; field observers link them with agitation and insomnia [Elektroda, tomaszo, post #551916]

What’s an affordable sensor for sub-20 Hz monitoring?

Many MEMS barometric sensors read pressure fluctuations down to 0.1 Hz. Pair a BMP388 module with an Arduino, then log and FFT the data (Approx. £25 total).

Can infrasound be used therapeutically?

Some clinics apply 12–18 Hz vibro-acoustic therapy for muscle relaxation; pilot studies report 30 % pain reduction (Lundeberg 2016). Always consult a physician first.

Is there a risk of structural damage from extreme lows?

Edge case: a 5 kW 18 Hz test made a car body visibly flex [Elektroda, powgreg, post #551197] Buildings resist larger loads; however, sustained > 150 dB below 20 Hz may loosen fasteners (engineering failure note).

How big would a speaker have to be to ‘torture’ neighbours with infrabass?

Forum estimates suggest twenty 18" drivers or a rotary woofer with 25 kW amp to exceed 115 dB under 15 Hz [Elektroda, hirogen, post #3273743] Cost and power make it impractical—and likely illegal.

Simple 3-step: safe infrasound testing at home?

  1. Generate a 20 Hz, –20 dBFS sine in Audacity. 2. Play through sealed-box sub at half volume, wearing hearing protection. 3. Measure SPL; keep under 90 dB. Stop if you feel pressure or dizziness.

Do ventilation ducts really ‘buzz’ because of infrasound build-up?

Yes. Long ducts can act as quarter-wave resonators around 7–15 Hz, causing persistent hum noted by residents [Elektroda, danutach-k, post #9478631]
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