logSPL
工具
¥15.00
包含在以下套装中
This App is a full featured sound level meter, designed by a signal processing expert. It is iPhone/iPod/iPad compatible and adapts itself to the actual screen resolutions ("HD", "retina").
It consists in two parts: half top for basic features, half bottom for advanced ones (L95, %D, ...).
Half top was thus designed to be extremely easy to use. Only two settings are requested:
* select 'fast' or 'slow' update rate, which corresponds to 2 different integration periods
* select the type of weighting: A or C or Z (Z meaning roughly: no filtering)
These settings are saved when exiting the App.
Some tips for weighting:
* select A to evaluate the feeling of a person against a noise
* select Z to balance an audio system
Supports upside-down orientation.
The min and max values are monitored and displayed in green in the upper view. An average value (Leq, LAeq, ...) is computed on top of this: the green triangle. Take care that this latter corresponds to the logarithm of the average power and not to the average of logarithm values, which is completely different. Integration time for this average value is: all time since start-up of the App or last reset.
To reset these extreme and average values, touch the text named RESET.
Bottom view is used to display an historical curve. A grid is visible, with lines every 10dB vertical and 10s horizontal.
Half bottom now:
* a real-time histogram is displayed on left side
* it can compute L%: L95, L50, ...
* it can make some dosemetering: for this you need to set threshold, criterion and exchange values. This is for advanced users due to the complexity of underlying concepts
As for all sound-meter (at any price, hardware or software), you should calibrate it against a reference in order to achieve best accuracy. For this go to Mic. tab to add or remove a fixed offset to the measured values.
Any question ? Click on the Facebook icon !
评分及评论
此 App 尚未收到足够的评分或评论，无法显示整体评分。
Re-compiled for latest iOS. Better handling of various screen sizes and shapes.
开发者“Fabien Lefebvre”已表明该 App 的隐私规范可能包括下述数据处理方式。更多相关信息，请参阅 开发者隐私政策 。
未收集数据
开发者不会从此 App 中收集任何数据。
辅助功能
开发者尚未表明此 App 支持哪些辅助功能。 进一步了解
信息
- 提供者
- Fabien Lefebvre
- 大小
- 1.1 MB
- 类别
- 工具
- 兼容性
设备需装有 iOS 15.2 或更高版本。
- iPhone
设备需装有 iOS 15.2 或更高版本。 - iPad
设备需装有 iPadOS 15.2 或更高版本。 - iPod touch
设备需装有 iOS 15.2 或更高版本。 - Apple Vision
设备需装有 visionOS 1.0 或更高版本。
- 语言
- 法语和英语
- 年龄分级
4+
- 4+
- 版权
- © 2011 Fabien LEFEBVRE
