Even while you are using a headphone, you should attention to ambient sounds.

The sound leaking out of headphones causes trouble for a person around you. You might have been using a closed type or canal type of headphones to avoid sound leakage. But, these types of headphones are would also interfere with that you listen to the sound around yourself (even your own voice).

- If you are talking to someone next while listening to music by the headphone, you would speak with profusely big voice.

- When you are listening to music while you wait your order of your medical examination, you might miss heard that you had been called.

- When you have addicted to music at home, your wife (or husband) gets angry, and she (he) says, "Hey! are you doing hear my talking?"

- When you are walking down the street with music, a car comes out suddenly, then you will be paralyzed with fear.

So, you should attention to ambient sounds even while you are using a headphone.

This application playback your ambient sound into your headphone.

You can operate in this application window with:

"Hear ambient sound" switch: switchs playback of ambient sound.

"Volume gain" slider: adjusts volume level of ambient sound.

"Cut off level" slider: adjusts cut off level. This app cuts the ambient sound playback if the sound level is lower than the cut off level. Adjust with this slider the sound level between the level you want to listen and the level you don't want to hear.

"Band pass filter" switch: switches band pass filter which cuts off the low and high frequency.

*** PRECAUTIONS ***

- This app has no music playback function. Use this with your favorite music applications.

- Playback ambient sounds will be delayed several 10 milliseconds.

- Be careful to adjust volume gain, it may cause very loud sounds.

- Touches or shocks on the smartphone or the microphone also may cause loud sounds.

- It may cause a howling depending on the combination of microphone and headphone.

- Driving a car or riding a bike, using headphone is dangerous, even if you use this application.