Shure SM87A Bruksanvisning

Shure mikrofon SM87A

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Sida 1/16

27D2964 (Rev. 1)

SM87A

SUPERCARDIOID CONDENSER MICROPHONE

MICROPHONE ÉLECTROSTATIQUE SUPERCARDIOÏDE

KONDENSATORMIKROFON MIT SUPERNIEREN-RICHTCHARAKTERISTIK

MICROFONO DE CONDENSADOR DE SUPERCARDIOIDE

MICROFONO SUPERCARDIOIDE A CONDENSATORE

コンデンサー型マイクロホン/スーパーカーディオイド

The Shure Model SM87A is a professional-quality, handheld condenser microphone for

use in sound reinforcement, broadcasting, and studio recording installations. Its super-

cardioid polar pattern provides greater rejection of unwanted sound sources, making it

ideal for miking individual instruments in a multi-microphone setting or for miking single

sources in a reverberant or noisy environment.

The SM87A features a controlled low-frequency roll-off tailored for optimum perfor-

mance when close-miking sound sources. An integral three-stage wind and pop filter

protects against wind and breath noise. Its built-in shock mount reduces stand and

handling noise. The SM87A operates on phantom power.

FEATURES

• Uniform super-cardioid pick-up pattern for maximum gain before feedback and

superior rejection of off axis sound

• Smooth, wide frequency response with gradual presence rise and controlled

proximity effect tailored for vocals

• Steel mesh grille and satin finished aluminum construction resist wear and abuse

• Very low susceptibility to RF and electromagnetic hum

• Minimally affected be varying load impedances

• Phantom powered

• Performs over a wide range of temperature and humidity conditions

• Cartridge shock mount system absorbs mechanical shock and minimizes handling

noise

• Built in pop-filter reduces undesirable wind and breathe noise

• Shure quality, ruggedness and reliability

APPLICATIONS AND PLACEMENT

The following table lists the most common applications and placement techniques.

Keep in mind that microphone technique is largely a matter of personal taste; there is

no one “correct” microphone position.

APPLICATION SUGGESTED MICROPHONE

PLACEMENT TONE QUALITY

Vocals Lips less than 15 cm (6 in.) away or

touching the windscreen, on axis to

microphone.

Robust sound, empha-

sized bass, maximum iso-

lation from other sources.

15 to 60 cm (6 in. to 2 ft.) away from

mouth, just above nose height.

Natural sound, reduced

bass.

20 to 60 cm (8 in. to 2 ft.) away from

mouth, slightly off to one side.

Natural sound, reduced

bass and minimal "s"

sounds.

90 cm to 1.8 m (3 to 6 ft.) away. Thinner, distant sound;

noticeable levels of ambi-

ent noise.

General Rules for Use

• Aim the microphone toward the desired sound source (such as the talker, singer, or

instrument) and away from unwanted sources.

• Place the microphone as close as practical to the desired sound source.

• Work close to the microphone for extra bass response.

• Use only one microphone to pick up a single sound source.

• Use the fewest number of microphones as practical.

• Keep the distance between microphones at least three times the distance from each

microphone to its source.

• Place microphones as far as possible from reflective surfaces.

• Add a windscreen when using the microphone outdoors.

• Avoid excessive handling to minimize pickup of mechanical noise and vibration.

• Do not cover any part of the microphone grille with your hand, as this will adversely

affect microphone performance.

Power

Condenser microphones such as the SM87A require phantom power supplied by a

mixer, preamplifier, or console.

Proximity Effect

Unidirectional microphones such as the SM87A progressively boost bass frequen-

cies by 6 to 10 dB below 100 Hz when the microphone is at a distance of about 6 mm

(1/4 in.) from the sound source. This phenomenon, known as proximity effect, can be

used to create a warmer, more powerful sound. To prevent explosive low frequency

sound during close-up use, the SM87A bass response gradually rolls off. This provides

greater control and helps the user take advantage of proximity effect.

MONITOR

P.A. LOUDSPEAKER

RECOMMENDED LOUDSPEAKER LOCATIONS FOR

SUPERCARDIOID MICROPHONES

SM87A

Avoiding Pickup of Unwanted Sound Sources

A supercardioid microphone has the greatest sound rejection at points 120° toward the

rear of the microphone. Place the microphone so that unwanted sound sources, such

as monitors and loudspeakers, are at these angles, directly behind it. To minimize not

feedback and ensure optimum rejection of unwanted sound, always test microphone

placement before a performance.

Produktspecifikationer

Varumärke:	Shure
Kategori:	mikrofon
Modell:	SM87A
Enhetsplacering:	Vrijstaand
Färg på produkten:	Roestvrijstaal
Dörrgångjärn:	Rechts
Inbyggd display:	Nee
Vikt:	84000 g
Bredd:	700 mm
Djup:	755 mm
Höjd:	1950 mm
Nettoskatt:	- W
Plugg typ:	Type F (CEE 7/4)
Sladdlängd:	2.17 m
Barnlås:	Nee
Ljudnivå:	40 dB
Energie-efficiëntieklasse:	E
Årlig-energiförbrukning:	291 kWu
Frys nettokapacitet:	153 l
Fryskapacitet:	18 kg/24u
Dörröppningsriktning utbytbar:	Ja
Lämplig för paneljustering:	Ja
Kylskåpets nettokapacitet:	309 l
No Frost (kylskåp):	Ja
Kylskåp invändig belysning:	Ja
Typ av lampa:	LED
Antal hyllor i kylskåp:	3
Antal-grönsakslådor:	2
Frysläge:	Onder
No Frost (frys):	Ja
Retentionstid vid strömavbrott:	18 uur
Snabbfrysfunktion:	Ja
Antal fryshyllor:	3
antal stjärnor:	4*
Total nettokapacitet:	462 l
Flaskställ:	Ja
Automatisk avfrostning (kylskåp):	Ja
Hyllmaterial:	Glas
Kylskåpsdörrfickor:	3
Till fackområdet:	Ja
Larm för öppen dörr:	Nee
Nuvarande:	1.5 A
Antal kompressorer:	1
Antal avtagbara plattor:	3
Klimaatklasse:	SN-T
Bulleremissionsklass:	C
Justerbara fötter:	Ja
Vattendispenser:	Nee
Strömavbrottsdetektor:	Nee
Felmeddelande:	Ja
Elektronisk styrning:	Ja
Ventilation:	Nee
AC-ingångsspänning:	220 - 240 V
AC-ingångsfrekvens:	50 Hz
Energieffektivitetsskala:	A tot G
Antal justerbara hyllor:	3