deciBel is the result of a serious effort to make an Android based SPL meter as close to a professional-grade device as the phone hardware limitations allow.
It uses a Fast Fourier Transform algorithm to implement a high precision A weighting filter and sophisticated digital signal processing techniques to achieve the best possible SPL readings out of your Android phone or tablet.
It displays the current, maximum and minimum values in decibels, and generates 3 kinds of sound pressure level versus time charts. The display can be turned upside down to allow pointing the mic at the sound source.
deciBel is supported by ads.
### Please calibrate before the first use! ###
Features:
- true A-Weighting (ANSI S1.4)
- simple calibration interface
- numeric dB, dBmin and dBmax display
- sliding sound level versus time chart
- sliding max, min and average soud level versus time chart
- accumulated sound level exposition chart (dosimeter)
- saves chart screen shots to the SD card
- dominant frequency display
- 22Khz bandwidth at the input of the weighting filter
- 1024 point real time FFT and digital sound processing
- movable to the SD card
分贝是认真努力的结果,使基于Android的SPL米,接近专业级的设备,随着手机硬件的局限性让。
A加权滤波器实现了高精度和复杂的数字信号处理技术,以达到最佳的声压级读数您的Andr??oid手机或平板,它采用了快速傅立叶变换算法。
显示当前的以分贝为单位的值,最大值和最小值,并产生3种声压的电平随时间变化的图表。显示器可以天翻地覆允许指向麦克风声源。
分贝是由广告支持的。
###第一次使用前请校正! ###
特点:
- 真正的A加权(ANSI S1.4)
- 简单的校准界面
- 数字分贝,dBmin和dBmax显示的
- 滑动声级随时间变化图
- 滑动最大,最小和平均SOUD水平随时间变化图
- 累积声级博览会图表(剂量计)
- 图画面拍摄保存到SD卡
- 主频显示
- 22Khz的上面的输入加权滤波器的带宽
- 1024点的实时FFT和数字声音处理
- 移动到SD卡
deciBel 1.5.23 更新内容:
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