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  1. K.A.

    High Pitch Noise Generated by Some Heat Pumps / Mini-Split Ductless Air Conditioners

    Some heat pumps and mini-split (ductless) air conditioners (especially the outdoor and indoor units) generate a relatively high-pitched noise when operating. I suspect it is caused by high-frequency switching circuits in the unit's power supply, as this is a known issue with other electronics...
  2. K.A.

    "Stable Exposure Conditions" — Limits to How Much Hearing Can Be Lost?

    https://emedicine.medscape.com/article/857813-clinical "In stable exposure conditions, losses at 3000, 4000, and 6000 Hz usually reach a maximum level in 10-15 years." I read this statement as "the more hearing already lost, the more noise I could tolerate without making it worse". What do...
  3. K.A.

    Netatmo Smart Smoke Detector Can Be Silenced Remotely — Any Experiences?

    This product is one of 2 I know that can be remotely silenced by an app on the phone (Google Nest Protect being the other.) Does anyone have it, does it work well, and is the alarm very loud and high pitch compared to other alarms? Any other suggestions of products with remote silence function...
  4. K.A.

    Should I Avoid Antioxidants (e.g., NAC) After Radiation / X-ray?

    Does someone know if and for how long one should avoid taking antioxidants after being exposed to radiation, e.g. Orthopantomogram (OPG), Computed Tomography (CT)? I'm having TMJ issues causing me to need such procedures being done now. I usually take NAC and/or Nicotinamide Riboside if...
  5. K.A.

    Is It Possible to Sleep Past Noise Levels That Are Damaging to Hearing?

    It might that I have become more sensitive to noise the last months, but sometimes when my neighbor uses his washing machine in his apartment below mine, the last part of the spin cycle (the one with high RPM) makes me feel the noise in the room above is quite loud and especially if you put your...
  6. K.A.

    What Frequencies Are Emitted from Dental Drilling?

    I'm trying to figure out more about the occlusion effect and especially how to prepare best for dental visits... Many have suggested drilling at lower speeds to reduce the noise (+ breaks and electric drills). Probably this RPM reduction will reduce dB generation at the source. However, the...
  7. K.A.

    Earmuffs Cause Jaw Pain — Any Suggestions How to Solve This? Maybe Get Better Earmuffs?

    Hi friends, So, my situation is this: Earplugs causes an increase of build-up of ear wax -> Need earwax removal more often -> Scary... Also I find they often give a bit more occlusion effect than earmuffs. Earmuffs don't affect the ear wax, and gives less occlusion, but the ones I have...
  8. K.A.

    Software for Compressing the Dynamic Range of Sounds on PC?

    Hi friends I, like many of you, unfortunately do not respond well at the time to sudden loud-but-not-actually-very-loud sounds. The "suddenness" or "dynamic range" of it is particularly difficult for me. I work on a computer most of my day, and the increase in the use if online-meetings has...
  9. K.A.

    How to Measure Earmuff Volume Regarding the Occlusion Effect?

    I have tried reading up on the occlusion effect lately, and one especially good paper I have found about it: http://www.protectear.com/wp-content/uploads/2010/10/earlog19.pdf However, when I measured the physical volumes of the largest ear protector I have (and know about), the Peltor X5A, I...