This is the picture of the player piano at Macy's (Ala Moana). Three notes are being played in this picture (I have no clue which notes). When the key is pressed down, a vibration was sent through the wires. The vibration has the same frequency as the natural frequency of the string. Resonance makes the surounding air vibrate, creating a sound. The frequency of each string is determined by the tension of the string, its density and its length. Each note has a unique string.

My phone is usually on vibrate. So it started vibrating when my sister called. The desk it was resting on began to vibrate as well, along with the air surrounding it. The vibrating phone acted as the driving force, and the table showed resonance. The driving force matched up with the natural frequencv of the table, causing it to vibrate at the same frequency. The phone also created waves in the air, making a buzzing noise.

This Saturday was the Ala Moana show for the dance program. As each group entered the stage, the music started playing. On the stage, the intensity of the music was much greater than it was from the audience on the second floor above Center Stage. Because the stage was closer to the speakers (the source of the sound waves), the radius was smaller, so the intensity was much stronger. With the stronger sound intensity, the level was higher and made the music seem louder while on stage.