This question is about sound.
The Table shows the frequencies of three sounds.
Table
| Sound | Frequency | Type of sound |
|---|---|---|
| whale call | 12 Hz | |
| dog whistle | 25 kHz25\ \text{kHz}25 kHz | |
| violin note | 440 Hz |
Give the frequency above which sound is called ultrasound.
State what is meant by infrasound.
Complete the Table by writing ultrasound, infrasound or audible sound for each sound.
Give one use of ultrasound.