This is a very difficult question to answer. It can vary widely depending on the volume and direction of the source, the humidity, foliage, and other factors. You may be able to hear an owl from half a mile away, but not be able to hear a mouse from a distance of fifty feet. As a rule of thumb, if you can hear it with your ears, the microphone will also hear it.

• Can I use Echo Meter Touch modules with USB connectors with iOS devices?
• What type of plug does my Echo Meter Touch module have?
• What type of data port does my phone or tablet have?
• What adapter do I need for my Echo Meter Touch module and Android or iOS device?
• What iOS devices are compatible with my Echo Meter Touch module?
• How do I update the firmware on my Echo Meter Touch module with USB to add iOS compatibility?
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• Are there acoustic differences between the first- and second-generation Minis?
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