Don't you hate to be on speaker phone? Hear static and poor connection noise at a conference call? Put yourself in your listener's shoes and make sure that the technology that you use is helping to transfer your message with the minimum of distractions.
You may want to consider a headset for your next conference call. This allows you maximum freedom, yet keeps the microphone close to your mouth and minimizes external noise that participants may hear from your end when you use a regular telephone.
There are many great headsets that are available and comfortable to wear. Many headsets have noise cancelling features that filter external noise and keep your call crystal clear. In fact many new phones come with headset options. Plantronics makes a nice selection of moderately priced and premium priced headset/telephone combinations. It may be time for you to consider using a headset for your next conference call.
If you are web conferencing, a head set is imperative as you will want to keep your hands free for typing, accessing an application or just appearing great in the video cam not with a receiver glued to your ear.