There could be several reasons why you perceive your own voice as loud, even if you have normal hearing. Here are a few possible explanations:
Bone conduction: When you speak, sound vibrations are not only transmitted through the air but also through the bones in your head, including your skull and jaw. This bone conduction can make your voice sound louder to you than it does to others, as they do not experience the same level of internal vibration.
Auditory feedback: When you speak, you hear your own voice both externally through the air and internally through bone conduction. This combined auditory feedback gives you a sense of how you sound. If the external sound is somehow muffled or altered, such as when wearing earplugs or in certain acoustic environments, it can create the perception that your voice is louder.
Selective attention: Your brain is constantly processing various sensory inputs, and it can selectively focus on certain stimuli while filtering out others. This includes your own voice. When you speak, your brain may prioritize processing your voice, making it more salient in your perception, even if the sound levels are objectively normal.
Psychological factors: Perception of sound can also be influenced by psychological factors. If you have an increased sensitivity or heightened awareness of your own voice, you may interpret it as being louder than it actually is. Stress, anxiety, or other emotional states can also affect your perception of sound.
If you have concerns about your hearing or the way you perceive sound, it is always a good idea to consult with a medical professional, such as an audiologist or an ear, nose, and throat specialist (otolaryngologist), who can provide a proper evaluation and offer appropriate advice or treatment if necessary.