While loudness is influenced by the energy of the sound wave and its distance from the source, pitch is purely a function of the sound wave's frequency. For example, a whisper and a shout may have the same pitch if spoken in the same note, but their loudness levels would be vastly dif...
saving energy but making proper mechanical ventilation essential to maintaining good indoor air quality. Good ventilation protects both your health and your home and is especially important in bathrooms which experience high levels of moisture and humidity. ...