價格：免費
檔案大小：14.4 MB
版本需求：需要 iOS 9.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Real Sound Meter is an app which can measure the actual sound level meter with decibels (dB). Sound meter is also known as sound level meter, decibel meter (dB meter), noise meter, sound pressure level meter (spl meter).
It uses your built-in microphone to measure environmental noise decibels (dB) and show a value for reference. We had calibrated many devices with the actual sound level meter with dB.
Features of Real Sound Meter:
- indicates decibel by gauge
- display the current noise reference
- display min/avg/max decibel values
- display decibel by graph
- can calibrate the decibel for each devices
- quick reaction on sound level change
Levels of noise in decibels (dB) according to American Academy of audiology:
140 dB - gun shots, fireworks
130 dB - jackhammers, ambulance
120 dB - jet planes taking off
110 dB - concerts, car horns
100 dB - snowmobiles
90 dB - power tools
80 dB - alarm clocks
70 dB - traffic, vacuums
60 dB - normal conversation
50 dB - moderate rainfall
40 dB - quiet library
30 dB - whisper
20 dB - leaves rusting
10 dB - breathing
IMPORTANT information about Real Sound Meter: This tool is not a professional device to measure decibels. You have to know that the built-in microphones were aligned to human voice (300-3400Hz, 40-60dB). Therefore the maximum values are limited by the hardware limitation, and very loud sound (100+ db) cannot be recognized.
Remember that sound meter app is only for fun and please use it as an auxiliary tool.
支援平台：iPhone, iPad