Low-Frequency Sounds and Their Impact on Hearing Health - Otolaryngology

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Low-frequency sounds, such as the hum from appliances like dehumidifiers, can indeed be a source of discomfort for some individuals, but their impact on hearing health is nuanced. Generally, exposure to low-frequency noise is less likely to cause hearing loss compared to high-frequency sounds, especially if the noise levels are below 90 decibels. However, prolonged exposure to any type of noise can lead to auditory fatigue and discomfort, which may manifest as symptoms like tinnitus (ringing in the ears) or a sensation of fullness in the ears.

In your case, since you have previously experienced tinnitus and have had your hearing checked by an ENT specialist with normal results, it is reasonable to conclude that your current experience with low-frequency noise is unlikely to be causing any direct hearing damage. The fact that both you and your mother can hear the noise suggests that it is indeed an environmental factor rather than an issue specific to your hearing. However, if the noise is bothersome enough to affect your quality of life, it may be worth considering soundproofing measures or using white noise machines to mask the low-frequency sounds.

Regarding your father's hearing, it is common for hearing sensitivity to decline with age, particularly for high-frequency sounds. If he does not seem to notice the low-frequency noise, it could be a sign of normal age-related hearing changes. However, if you notice any communication difficulties or if he seems to be straining to hear conversations, it might be beneficial for him to undergo a hearing evaluation. Early detection of hearing loss can lead to better management options, including hearing aids or other assistive devices.

It's also important to consider the psychological effects of persistent noise exposure. Chronic noise can lead to increased stress levels, sleep disturbances, and even hypertension, as you mentioned in your query. If the low-frequency noise is causing significant distress, it may be helpful to explore relaxation techniques, cognitive behavioral therapy, or even consultation with an audiologist who specializes in sound sensitivity issues.

In summary, while low-frequency sounds are generally less harmful to hearing than high-frequency sounds, they can still cause discomfort and stress. Monitoring your symptoms and considering environmental modifications can be beneficial. If you or your family members experience persistent issues or if there are concerns about hearing loss, seeking further evaluation from a healthcare professional is always a prudent step.