确定分贝槽耳机
我正在尝试开发一种听力测试，该测试通过耳机以不同的频率输出不同的音调。用户听到声音后，应记录相应的分贝级别。
我知道已经有在线数字听力测试。但是我想知道它们如何确定DB水平，而无需麦克风。
目前，我仍未找到计算分贝水平的方法。
这是我的问题：
- 有什么方法可以根据耳机的音量得出DB？
- 在研究时，我经常遇到“校准耳机”一词。在测量数据库的背景下，校准耳机意味着什么？
I am trying to develop a hearing test that outputs different tones at different frequencies through the headphones. As soon as the user hears the sound, the corresponding decibel level should be recorded.
I know that there are already online digital hearing tests. But I wonder how they determine the dB level, without a microphone.
Currently, I am still failing to find a way to calculate the decibel level.
Here are my questions:
- is there a way I can derive the dB based on the volume of the headphones?
- while researching I often came across the term “calibrating headphones”. What does calibrating headphones mean in the context of measuring dB?
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评论（1）
这确实是一个硬件问题。您说“找到一种方法计算分贝级别”。这告诉我您无法理解问题域。这不是计算问题。
作为一个简单的示例，为什么不这样做，有些耳机具有模拟增益控制。使用软件中完全相同的音量设置的完全相同的耳机将产生不同的分贝级别。
因此，问题1的答案很难。
“校准耳机”是一项相当普通的校准活动，但是您的问题2表明您一般不熟悉校准。在这种情况下，这意味着您可以确定使用已知硬件（连接到已知音频硬件的特定麦克风）的每个设置都有多大的声音。
这不太可能为您提供帮助 - 而不是使用已知的耳机，而是需要一个已知的麦克风。
This really is a hardware problem. You say "find a way to calculate the decibel level". That tells me that you fail to understand the problem domain. It's not a calculation problem.
As a simple example why it's not, some headphones have an analog gain control. The exact same headphone, using the exact same volume setting in software, will produce different decibel levels.
Hence, the answer to question 1 is a hard NO.
"Calibrating headphones" is a fairly ordinary calibration activity, but your question 2 suggests that you're not familiar with calibration in general. In this context, it means that you determine using known hardware (a specific microphone, connected to known audio hardware) how loud an unknown headphone for each of its settings.
This is unlikely to help you - instead of using known headphones, you now need a known microphone.