Which term encompasses all hearing losses regardless of type, classification, or onset?

The term "hearing impairment" is indeed the most encompassing term when referring to all types of hearing losses, regardless of their classification, type, or when they occur in life. This broad categorization includes various degrees and forms of hearing loss, whether it is congenital, acquired, temporary, or permanent, mild or profound.

By using "hearing impairment," practitioners and researchers can address the diverse experiences and needs of individuals who face challenges with their auditory abilities without limiting the discussion to specific categories or conditions. This term is also beneficial in clinical and educational settings, as it allows for a more inclusive approach when developing intervention strategies or support for individuals with any level of hearing loss.

In contrast, the other terms provided have more specific meanings. "Deaf" often refers to profound hearing loss or a complete lack of hearing, while "deaf culture" relates to the specific community and social practices of individuals who identify as Deaf. "Assistive hearing device" pertains to any tools or technology designed to aid individuals with hearing loss, but it does not describe the condition of hearing loss itself. Thus, "hearing impairment" stands out as the most comprehensive term in this context.