I use speech recognition all day long for my work and most of my personal activities. Put aside taking frequent short breaks, making sure that I don't speak unnecessarily louder than I need to achieve a high speech recognition accuracy, and drink frequently, what else can I do to avoid voice strain?
Some more advice from https://web.archive.org/web/20170226165240/https://www.nidcd.nih.gov/health/taking-care-your-voice:
- Limit your intake of drinks that contain alcohol or caffeine, which can cause the body to lose water and make the vocal folds and larynx dry. Alcohol also irritates the mucous membranes that line the throat.
- Use a humidifier in your home. This is especially important in winter or in dry climates. Thirty percent humidity is recommended.
- Avoid or limit use of medications that dry out the vocal folds, including some common cold and allergy medications. If you have voice problems, ask your doctor which medications would be safest for you to use.
Maintain a healthy lifestyle and diet:
- Don't smoke and avoid second-hand smoke. Smoke irritates the vocal folds. Also, cancer of the vocal folds is seen most often in individuals who smoke.
- Avoid eating spicy foods. Spicy foods can cause stomach acid to move into the throat or esophagus, causing heartburn or GERD.
- Include plenty of whole grains, fruits, and vegetables in your diet. These foods contain vitamins A, E, and C. They also help keep the mucus membranes that line the throat healthy.
- Wash your hands often to prevent getting a cold or the flu.
- Get enough rest. Physical fatigue has a negative effect on voice.
- Exercise regularly. Exercise increases stamina and muscle tone. This helps provide good posture and breathing, which are necessary for proper speaking.
- If you have persistent heartburn or GERD, talk to your doctor about diet changes or medications that can help reduce flare-ups.
- Avoid mouthwash or gargles that contain alcohol or irritating chemicals. If you still wish to use a mouthwash that contains alcohol, limit your use to oral rinsing. If gargling is necessary, use a salt water solution.
- Avoid using mouthwash to treat persistent bad breath. Halitosis (bad breath) may be the result of a problem that mouthwash can't cure, such as low grade infections in the nose, sinuses, tonsils, gums, or lungs, as well as from gastric acid reflux from the stomach.