BT-21759-134

S/N Ratio:	--
Shape:	Rectangular
Height (Max):	0.090" (2.29mm)
Size / Dimension:	0.310" L x 0.218" W (7.87mm x 5.54mm)
Termination:	Solder Pads
Port Location:	Top
Current - Supply:	50µA
Voltage Range:	0.9V ~ 10V
Voltage - Rated:	1.3V
Impedance:	3.5 kOhms
Series:	BT
Sensitivity:	-60dB ±3dB @ 74dB SPL
Frequency Range:	100Hz ~ 10kHz
Direction:	--
Output Type:	Analog
Type:	Electret Condenser
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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BT-21759-134 Application Field and Working Principle

Microphones are one of the most widely used pieces of audio equipment in sound recording, audio production, and other related fields. The BT-21759-134 is a cardioid polar pattern dynamic microphone that is highly versatile and suitable for both indoor and outdoor use. This article will discuss the application field, working principle, and features of the BT-21759-134 microphone.

Application Field

The BT-21759-134 is primarily used in vocal and instrument capture applications. The cardioid polar pattern allows for superior off-axis rejection, which is useful for reducing unwanted off-axis sound from instruments or vocalists in a noisy environment. This microphone is also suitable for speech, podcasting, and audio-for-video applications, as the high sensitivity of the microphone captures every detail clearly. Due to the robust build and construction quality, the BT-21759-134 is also reliable in outdoor applications such as live performances where it does well with high ambient noise levels and wind noise.

Working Principle

The BT-21759-134 features a variety of components that make it an effective and reliable microphone. The transducer element is a tight cardioid dynamic capsule that produces a tight polar pattern and a clear, detailed output. The low-noise design of the microphone ensures minimal noise interference and a clear signal-to-noise ratio. The robust construction of the BT-21759-134 enables it to handle high SPL bursts without distortion.

Features

The BT-21759-134 features a hypercardioid polar pattern for increased sound rejection off-axis. The built-in low-frequency roll-off switch eliminates unneeded bass frequencies to make sure only the most important signals are heard in audio recordings. The switchable low-cut filter also helps reduce wind noise while out in the field. The BT-21759-134 also features an interchangeable handle for convenience and an integrated shock mount that helps reduce handling noise. The microphone has a frequency range of 20Hz to 18kHz with a sensitivity of -55dB and an output impedance of 200 ohms. In conclusion, the BT-21759-134 is an excellent choice for vocal and instrument capture applications, as well as speech and podcasting applications. The high sound rejection and low-noise design make it a must-have piece of audio equipment for any audio production environment or outdoor application. With its variety of useful features and robust construction, the BT-21759-134 is the ideal choice for any project.

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