Lower pitch is desirable because it projects and carries better.
Tone - How you say it is sometimes more important than what you say. Your voice should reflect sincerity, pleasantness, confidence, and interest.
Rate - if you speak too rapidly, people start listening to how fast you're talking instead of what you are saying. Speaking too slowly can be irritating to the listener.
Avoid talking with anything in your mouth, such as cigars, cigarettes, chewing gum, or pencils.
Ask questions. It makes you appear pleasant and more interesting.
Group interviews can be the most aggravating on all interviews, due to the fact that there may be 20 other people there competing for the same position. The best thing that can be said about group interviews is that typically there are also multiple openings. When sitting in group interviews, it's always nice to know that you're the best dressed in the room. Take this time to impress the hiring manager, so you stand out in a crowd.
Interviews with multiple managers
Interviews with more than one hiring manager at the same time can be intimidating to many people who are not experienced interviewing. Attention should be given to all parties at the interview. Be sure to maintain eye contact to the person you are talking with.
The best way to perform at an interview with more that one person is simply to think of it as an individual interview. Always answer each question to the one who has asked the question. Do not feel as though each answer has to be answered to the group.
Second and Third interviews
Second and third interviews are typically because you are in the running, but you have not yet won the race. Many companies will have more interviews than one when they just can't decide between two or more candidates. Each interview is an opportunity to make an impression again. Your dress and mannerism is just as important on the second or third interview. You should be prepared to negotiate salary at you second interview if it was not brought up at the first one.