No, presbycusis does not always lead to profound deafness; however, it can significantly reduce your ability to hear clearly in noisy environments like restaurants and churches. In addition, the degree of this impairment depends on its severity; mild cases may only result in difficulty understanding speech, while more severe cases may make it difficult for you to carry on a conversation at all. Treating your hearing loss is also essential, and the sooner you receive treatment, the better you'll be able to acquire and preserve your speech understanding. The brain is like a muscle; the more you use it and keep it processing and active, the better your overall brain health will be.