There are several possible sources of a constant low-frequency sound that could be coming from an apartment neighbor. Here are a few common examples:
HVAC Systems: Heating, ventilation, and air conditioning (HVAC) systems can sometimes generate low-frequency vibrations or humming sounds, especially if they are old or poorly maintained. These vibrations can be transmitted through walls and other structures, causing a constant low-frequency noise.
Appliances: Certain appliances, such as refrigerators, freezers, or washing machines, may produce low-frequency sounds during their operation. If these appliances are located near a shared wall between apartments, the sound can easily transfer and be audible in neighboring units.
Industrial Equipment: If your neighbor has industrial equipment or machinery in their apartment, it could produce low-frequency noise. This could include things like generators, pumps, or specialized tools. However, it is relatively uncommon for people to have such equipment in residential apartments.
Audio Equipment: High-powered subwoofers or audio systems can generate low-frequency sounds that can be heard from neighboring units, particularly if they are played at high volumes. Bass-heavy music, movies, or video games can cause this type of disturbance.
Mechanical Issues: Sometimes, mechanical issues within a building, such as vibrating pipes, malfunctioning ventilation systems, or faulty elevators, can create low-frequency sounds that are transmitted throughout the structure and reach neighboring apartments.
It's worth noting that identifying the exact source of the sound can be challenging. If you are experiencing persistent noise from a neighbor, it is recommended to politely communicate your concerns with them, as they may not be aware of the issue. Additionally, contacting the building management or landlord can help address the problem and find a suitable solution.