To play online press the screenshot above and then the start button.

# Interactive Sound Force Comparison.

 "Sound Comparison" is a small knowledge level game to sort the objects by their correct value in order of sound magnitude. Physics exercise to explore and study the sound noise of different objects from lowest to highest. Fun educational game, suitable for online lessons and interactive classes. Free online game for physics homework. Online physics educational game. Fun physics puzzle.

This physics class game include the following objects:
• ---- Quiet ----
• Flying mosquito - 3 dB
• Working computer fan - 20 dB
• Rustling of a stream - 40 dB
• ---- Normal ----
• Sound of normal conversation - 60 dB
• Sound of ringing telephone - 80 dB
• Sound of the helicopter - 100 dB
• Treshold of pain - 130 dB
• ---- Loud ----
• Sound of the jet plane - 150 dB
• Sound of rocket launch - 180 dB
• Sound of erupting volcano - 235 dB
• Sound of exploding supernova - 440 dB decibels

## How to play Sound Comparison Puzzle.

 There are 11 round pictures of objectas with different sound noise, which will appear randomly on the game screen. Drag and drop them in the correct slots according to their approximate sound value in decibels, situated at the bottom of the screen. Sort all 11 objects to win the game.
Knowledge Achievements:
Know different sound loud and get +1 Knowledge Level.
Difficulty: Medium.

### Class subject: Sound.

 In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. Only acoustic waves that have frequencies lying between about 20 Hz and 20 kHz, the audio frequency range, elicit an auditory percept in humans. The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel (B). It expresses the ratio of two values of a power or root-power quantity on a logarithmic scale. The decibel is useful for representing large ratios and for simplifying representation of multiplicative effects, such as attenuation from multiple sources along a signal chain. Its application in systems with additive effects is less intuitive, such as in the combined sound pressure level.

This fun physics game may answer the following questions:
• Which is the lowest sound humans can hear?
• Which is the loudest sound humans can endure?
• What is the sound difference of objects?