Poradniki online Thomann: Reporter Mics

6. Understanding Specifications

In addition to some of the basic design characteristics we’ve discussed, there are some technical specifications which are particularly associated with microphones – let’s look at the most important to understand:

Frequency Response

Numbers alone will not tell you that much in this area, as not many microphones have such a limited frequency response that they do not cover the area corresponding to human speech! More useful is a frequency response graph which displays the amplitude of response at any given frequency, generally only for sound directly into the front of the microphone, although sometimes additional graphs are given for ‘off axis’ response. Although you might expect an ideal microphone to have a straight-line graph, it’s variation in frequency response that is mainly responsible for giving different mics their distinctive characters. Microphones aimed at speech use will often have a lift in the midrange to aid intelligibility – look for a boost between around 500Hz and 3kHz – not much higher though or excessive sibilance (over-emphasised ‘S’ sounds) will ensue.

Sensitivity

Sensitivity expresses the microphone’s ability to convert the movement of its diaphragm to electrical voltage. To accurately measure the sensitivity of a microphone, a manufacturer will place it in a ‘reference sound field’ to measure the output voltage against a known sound pressure level (see below), and this stated as its sensitivity, usually in mV/Pa where higher numbers are better, or sometimes in dBV, where confusingly figures are negative, and numbers closer to zero (i.e. less negative) are better. In a situation where you’re recording low-level signals as is common with speech, particularly where the microphone will be a distance away from the speaker, it’s important to use a mic with high sensitivity (and therefore high output) in order to keep noise levels relatively low in any following circuitry.

Self Noise

A microphone, like all electronic devices, generates noise. The amount though is usually well below the noise level of other equipment, and so generally isn’t a factor when recording loud or moderately loud sound sources. However, microphone noise can be a problem when recording very quiet sound sources. Manufacturers are aware of this problem, and many mics are now advertised as having low noise. It is usually termed 'self noise’, ‘equivalent noise SPL’ or ‘noise floor' in specifications, and is the audible noise level the microphone produces when it’s placed in isolation from external sound sources. Dynamic mics usually have particularly low self-noise as they don’t have the electronic component count of condenser mics.

Sound Pressure Level (SPL)

Sound Pressure Level is a reference standard that indicates how loud a sound is, measured in decibels or ‘dB’. The ability of a microphone to handle high SPLs without distortion is primarily determined by its basic type. Dynamic mics are generally the most robust in this respect, and can usually handle SPLs of 140dB or more. Ribbon microphones are the weakest and can actually be destroyed by too high a level. Although the diaphragm of most condenser mics generally won’t distort except under the most severe SPLs, their built-in pre-amps can be overloaded to the point of distortion, so figures vary widely depending on their quality. Many condensers have an attenuation ‘pad’ switch though, which reduces the level of the signal before the pre-amp to avoid overloading. When using the pad, keep in mind that the signal-to-noise ratio is degraded by the amount of attenuation, so in normal SPL conditions it’s wise to switch out the pad - this shouldn’t be needed in most reporting situations in any case, unless you’re in a war zone!

Twój asystent sprzedaży
Tel: +49-9546-9223-30
Fax: +49-9546-922328
PA
Tel: +49-9546-9223-35
Fax: +49-9546-9223-24
Fani o nas
Super obsluga klienta, polecam sklep
Jane Doe, 27.11.2015

Zestawienie Reporter Mics

Yamaha P-125 BK Boss GT-1000 Fender SQ Affinity Strat Pack HSS BSB Reloop RP 4000 MK2 Yamaha PSR-E463 Gator iMac 21" Tote Bag Flyht Pro Rack Drawer 19" 3U 28 cm lock XVive Wireless System U2 Red Aston Microphones SwiftShield Tama DSB62SN Bag Set Rock Darkglass Vintage Ultra v2 LD Systems U518 BPH2
(1)
polecane
Yamaha P-125 BK

Stage Piano Graded Hammer Standard Keyboard (GHS) with 88 weighted keys, Pure CF Sound Engine, 24 Tones, Max. Polyphony: 192 votes, Dual, split and duo function, Two-track recording (one song), 20 Rhythms (drums + bass), Intelligent Acoustic Control, 21...

przejdź do produktu
549 €
(1)
polecane
Boss GT-1000

Multi effect pedal 32-bit AD / DA, 32-bit floating-point processor and 96 kHz sampling rate, New BOSS DSP engine, specially developed for audio applications, AIRD (Augmented Impulse Response Dynamics) brings BOSS's Tube Logic concept to a digital guitar processor,...

przejdź do produktu
990 €
(2)
polecane
Fender SQ Affinity Strat Pack HSS BSB

Fender Squier Affinity Strat Pack HSS BSB IL e-guitar set with e-guitar stratocaster, frontman 15G amp, cable, strap and picks; e-guitar, poplar body, maple neck, indian laurel fretboard, 21 medium jumbo frets, nut width 40,9mm (1,61"), scale 648mm (25,5"), pickups...

przejdź do produktu
277 €
polecane
Reloop RP 4000 MK2

Quartz-driven DJ turntable with high-torque direct drive Speeds (RPM): 33 1/3 - 45 - 78, Pitch with selectable range of +/- 8% and+/- 16%, Reverse function, Connections: 1 PHONO output (gold plated) and 1 GND ground connection, Incl. platter,...

przejdź do produktu
277 €
polecane
Yamaha PSR-E463

Yamaha PSR-E463 Keyboard 61 touch responsive keys, 758 sounds, 235 styles, 48-note polyphony, 1 One Touch Setting, Effects: Reverb, Chorus, Master EQ, Harmony, Arpeggio 150 typs; Duo mode, SMF Formats 0 & 1, Registration Memory, Metronome, Transpose, incl. Yamaha Education...

przejdź do produktu
315 €
polecane
Gator iMac 21" Tote Bag

Nylon Bag Fits 21" Apple iMac Water resistant, Good grip and protection with adjustable foam blocks and hard-panel reinforcement in the front flap, Foldable sun and dust protection, Double zipper, Strap and handle cutouts, Reinforced, detachable carrying handles, PVC...

przejdź do produktu
121 €
polecane
Flyht Pro Rack Drawer 19" 3U 28 cm lock

Flyht Pro Rack drawer 19" 3U 28 cm with lock. Robust and easy glide lockable metal rack drawer. Colour: black, Dimensons: WxHxD 483 x 134 x 280 mm, weight: 6,3 kg

przejdź do produktu
44 €
polecane
XVive Wireless System U2 Red

2.4 GHz Wireless System Set with transmitter and receiver - both with battery and without power supply to operate, Built-in, rechargeable lithium battery, Range without obstacles: up to approx. 30 m, Frequency range 20 - 20,000 Hz, Latency: <6...

przejdź do produktu
129 €
polecane
Aston Microphones SwiftShield

Aston Microphones SwiftShield; Universal Mic Mount and Pop-Filter; Mic Mount Features: without Rubber Bands; fits Mics from 30 to 50 mm Diameter; two quick release spring clips; made of Aluminium, grade glass-fill nylon polymer and medical grade latex ("ShockStar" suspension);...

przejdź do produktu
88 €
polecane
Tama DSB62SN Bag Set Rock

Tama DSB62SN Drum Bagset, Set containing 22"x18" Bass Drum, 10"x08" + 12"x09" Tom, 14"x14" + 16"x16" Floortom, 14"x6,5" Snaredrum, 600 denier high density water resisters surface, 10mm Padded, Carrying Strap with Shoulder Pad, Finish Blag with white Tama Logo,

przejdź do produktu
148 €
polecane
Darkglass Vintage Ultra v2

Darkglass Microtubes B7K v2 Bass Overdrive, effects pedal, all the versatility and sonic possibilities of the first version plus: single user loadable cabinet simulation impulse response, micro-USB B port to connect to PC/Mac, 3.5mm headphone output with cabinet simulation, balanced...

przejdź do produktu
415 €
polecane
LD Systems U518 BPH2

Dual UHF wireless system with 2 bodypack transmitters 2 Dynamic headset microphones MH1 in black, Directivity: Cardioid, 19" 1U True diversity receiver, Frequency band: 1785 - 1800 MHz, Audio transmission range: 30 - 16,000 Hz, 96 Channels in 8...

przejdź do produktu
555 €
Zgłoś błąd Zauważyles błąd i chciałbys nas o tym powiadomić?

Dziękujemy za Twoją wiadomość, zostanie ona przetworzona najszybciej jak to możliwe.

Proszę napisać wiadomość Proszę wpisać adres eMail.