Sennheiser SER 1-3 User Manual download pdf (Page 29)

Lavalier Microphones

MD 214 N MD 214

U-3 MD 214-1

Frequency range: 60 to

15,000

Hz.

Omnidirectional

characteristic.

Shock

-mounted

system ensures

maximum

possible

handling noise damping.

Frequency response specific to application.

This

special

-purpose microphone is designed to

be worn around the

neck

and to produce exactly

the same quality of sound

as a

hand

-held or stand -

mounted microphone. This is rather more

difficult

than

it may

initially

appear: the

high frequencies

are

much

attenuated by the time they

reach

a

microphone suspended against the chest.

Unfortunately

the

resonance

of the chest

tends to

amplify unduly the

frequencies

around

700

Hz.

The frequency range

of the

MD

214 therefore

displays two deliberate corrections:

the dis-

advantage of

high frequencies has

been

compensated by a sharp

rise

above

the 2,000 Hz

level.

Over- emphasis of

frequencies

around

700

Hz

has

been compensated by a co- ordinated

lowering

of the

frequencies.

Consequently,

when

worn

correctly, the

MD 214 produces exactly the

same qualtiy as a

microphone with a 3 -line

frequency range before the

mouth

of the speaker.

In addition the insensitivity of such

a Lavalier

microphone

to

friction

and contact

noises

is

also

very important. For this

reason

the MD 214

capsule

has

been spring-

mounted

on

a patented

suspension system

within the

microphone

housing. A very

smooth

non -reflective

lacquer -

important

for TV

broadcasting

purposes

-

has

been applied to the exterior of

the

metal

casing.

Technical

data and

differences between the

various

models will

be

found

in

the summary

on

pages 32 to 35.

Small

Tuchel

plug

"Cannon"

plug

Frequency response

curve

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Upper curve

Lower

curve

frequency

frequency

response

response

===z

when

in

used as

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sound

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29

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