Could some people be more sensitive to the noise than others even by exposure of less decibel it is suggested normally?

Yes, some people may be more sensitive to noise than others, even at lower decibel levels. This can be due to a variety of factors, including:

Individual differences in hearing sensitivity: People's hearing sensitivity can vary naturally, even among those with normal hearing. Some people may have more sensitive hearing and be able to detect sounds at lower decibel levels than others.

Age-related hearing loss: Age-related hearing loss, known as presbycusis, can affect people differently and can make them more sensitive to certain sounds, especially high-frequency sounds.

Tinnitus: People with tinnitus, a condition characterized by a constant ringing or buzzing in the ears, may be more sensitive to noise as the tinnitus can make it harder to distinguish between external noise and the internal ringing sound.

Hyperacusis: Hyperacusis is a condition in which people experience pain or discomfort from sounds that are not typically considered loud or harmful. Individuals with hyperacusis may be highly sensitive to a wide range of sounds, even at relatively low decibel levels.

Stress and anxiety: Stress and anxiety can lower the threshold for noise sensitivity. When under stress, the body's "fight or flight" response can make the ears more sensitive to sound.

Certain medical conditions: Certain medical conditions, such as Meniere's disease and otosclerosis, can affect hearing and make individuals more sensitive to noise.

Ototoxic medications: Some medications, known as ototoxic medications, can damage the hair cells in the inner ear and lead to hearing loss and increased noise sensitivity.

Acoustic trauma: Exposure to loud noise, such as from occupational noise or recreational activities, can damage the structures in the inner ear and result in noise sensitivity.

It's important for individuals who believe they may be more sensitive to noise to consult with an audiologist or medical professional to assess their hearing and determine the underlying cause of their sensitivity. Appropriate management strategies, such as noise-reduction techniques and hearing protection devices, can be recommended based on the individual's specific needs.