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Lavalier Microphones
External microphones are versatile and in many cases better suited for general-purpose
use than the smartphones' or tablets' internal devices. Dynamic "Lavalier" microphones
offer a frequency response of 50 Hz — 18 kHz, are small in size, fit neatly near the
neck of a speaker, and clip freely to almost any piece of clothing. Thus, lavalier
microphones provide a hassle-free technique of recording an audio source at high quality.
Selecting the Optimal Microphone
Audio signals are recorded with a sampling rate of 48 KHz and at a 16-bit resolution (stereo).
The resulting quality depends on the audio equipment in use. In particular, the smartphones'
and tablets' internal microphones are sometimes insufficient so that dynamic "Lavalier"
microphones can be a much better choice as such devices are less sensitive to background noise
and pick up sounds more purely.
Sony ECMCS3 is a budget-friendly, omnidirectional electret condenser microphone with a
frequency response of 50 Hz — 18 kHz (stereo). A TRRS microphone adapter is required to connect
the 3.5 mm stereo jack plug to the smartphones' combo audio port.
Audio-Technica ATR-3350iS is a high-quality omnidirectional condenser microphone that
comes with a foam windscreen, a LR44 battery, and a TRRS microphone adapter. It features a frequency
response of 50 Hz — 18 kHz.
Rode SmartLav+ is one of the best Lavalier microphones on the market (condenser capsule).
It comes with a foam windscreen and features a frequency response of 60 Hz — 18 kHz. It plugs
into the smartphone's combo audio port.
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You can either use the internal microphone of your smartphone, or an external
microphone attached with its small clip to a suitable location of your clothing (e.g., Sony
ECMCS3, $19). It may be a good idea to test various positions. Subsequently, use the optimal
location for best results in repeated recordings.
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