SoundWaveMonitor

This app shows the sound wave received through the microphone (built-in mic, mic jack, Bluetooth hands-free mic).
The acquired data shown on the graph flows from right to left and the flow speed can be adjusted by the averaging times.
This app is mainly designed to show low-frequency signal received through mic-jack.
(Most of conventional "oscilloscope" apps are suitable to show high-frequency sound signal.)
When "Filter" is off, your iOS device does minimal signal processing.
It will be convenient to show the received data as it is.
When "Filter" is on, the sound settings of your iOS device turns to default settings
and the low frequency will be cut off. It will be convenient to show the 100 to 1kHz sound wave.

When "Wireless" is on, the Bluetooth hands-free microphone is used if it is connected.

音声入力（内蔵マイク、外付けマイク、Bluetoothハンズフリーマイク）をそのまま
波形として表示するアプリです。
右から左へ流れるようにゆっくりと表示できるところが特徴で、
100Hz以下のアナログ波形を表示させるのに適しています。
"Filter"をオンにすると、音声入力設定がデフォルト設定になり、
低音がカットされるなどの現象が出ます。
”Wireless"をオンにすると、Bluetoothハンズフリーマイクが有効になります。