Phil Newton, at the Founders Ministries Blog, writes:
Sermons may be preached without application but not good sermons. I did not always think that to be the case. Recognizing the power and authority of God’s Word, I went through a time when I thought that just rightly preaching the Word and letting the Holy Spirit make application would be enough. And certainly the Holy Spirit makes applications that the messenger cannot begin to recognize. Yet that position betrays the examples of Jesus, Peter, and Paul in their preaching.
The voice is the preacher’s primary tool, and we need to keep it in good condition. Reminded of and freshly and uncomfortably impressed with some of the elements of vocal hygiene, and being very willing to help other preachers keep their voices healthy, and equally to spare anyone the experience of a doctor inserting what looks and feels like a car aerial into your nasal cavities, or worse, herewith some counsels (garnered over many years) on vocal hygiene tailored to the preacher, arranged topically, some or all of which may be helpful to some. A lot of it is sanctified common-sense, and I should imagine that most preachers do most of it almost naturally.
Dr. T. David Gordon (PCA), Professor of Religion and Greek at Grove City College and author of “Why Johnny Can’t Preach“, delivers a lecture series on preaching at Southern Baptist Theological Seminary, “Preaching In A Digital Culture”.