Question
Download Solution PDFWhich of the following instrument is used to measure sound under water?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Hydrophone.
Key Points
- The Hydrophone was invented by Reginald Fessenden in 1914.
- The word hydrophone is the combination of hydro and phone where hydro means water and phone means sound hence hydrophone is used for measuring sound under the water.
| Name of the Instrument | Functions/ Used for |
| Hydrophone | Measures sound under the water. |
| Hydroscope | A device to see an object at a considerable distance below the surface of the water by means of a series of mirrors enclosed in a steel tube |
| Hypsometer | Determines the boiling point of the liquid. |
| Machmeter | Determines the speed of an aircraft relative to the speed of sound. |
| Ondometer | Measures the frequency of electromagnetic waves. |
| Ohmmeter | Measures electrical resistance. |
| Odometer | Measures distance travelled by a vehicle. |
| Nephelometer | Measures the scattering of light by particles suspended in a liquid. |
| Microscope | Gives a magnified view of small objects. |
Additional Information
| Name of the Instrument | Functions/ Used for |
| Optometer | Testing the refractive power of the eye. |
| Otoscope | Visual examination of the eardrum. |
| Quadrant | Measures altitudes and angles in navigation and astronomy. |
| Sextant | Measure the angular distance between two objects. |
| Refractometer | Measures the refractive index of a substance. |
| Rain Gauge | Measures rainfall. |
| Seismograph | Recording intensity and origin of earthquake shocks. |
| Pyrheliometer | Measuring solar radiation. |
| Photometer | Compares luminous intensity of two sources of light. |
| Phonograph | Reproduces sound. |
Image of Hydrophone:
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