| Question |
Answer |
| acoustics | The effect of materials and their shapes on sound. |
| amplitude | The distance that a wave rises or falls from its normal rest position. |
| beats | The destructive interference of two sound wave with slightly different frequencies and similar amplitudes. |
| compressions | A region where air molecules are pushed closer together than normal by the energy of a wound wave. |
| decibels (db) | The smallest difference in intensity between two sounds that the human ear is capable of detecting. |
| Doppler effect | The effect of motion on sound; named in honor of the Austrian physicist Christian Doppler. |
| Echolocation | Animals use this to find prey by sending out a high-pitched frequency which bounces off the prey. |
| frequency | The number of waves that pass a given point in one second. |
| infrasonic waves | Sound waves that are too low in frequency for the human ear. |
| loudness | Related to intensity; how strong or weak a sound is to an observer. |
| pitch | The distance between two adjacent threads on a screw; how high or low a tone sounds to an observer (related to frequency). |
| rarefactions | A region where the air molecules are spread apart by the energy of a sound wave. |
| resonance | The transfer of energy from one object to another object with the same natural frequency. |
| sonar | A type of listening device that uses sound waves to locate object; sound navigation and ranging. |
| sound | Mechanical waves that can often be detected by our ears. |
| threshold of hearing | The very softest sound level that can be detected by an observer. |
| ultrasonic waves | Sound waves that are too high in frequency for the human ear to hear. |
| waves | Rhythmic disturbances that transfer energy through space or matter. |
Biology Lab Midterm
