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caractéristiques techniques

NoiseGardHMEC 25-KA / -CA

 

 

Casque

Principe transducteur

dynamique, ouvert, supra-aural

Bande passante

 

16 Hz - 22 kHz

Impédance

active/passive

200 Ω (mono) 400 Ω par côté (stéréo)

 

 

Volume active et passive egale

Distorsion harmonique

< 1 %

Compensation active et passive

15 dB + 3 dB de 100 Hz à 2 kHz

Bande passante du compensation

50 - 600 Hz

 

 

Microphone, préamplificateur inclus

Principe transducteur

Capsule à électret (autopolarisée) à

 

 

compensation de bruit

Bande passante (distance entre

 

microphone et le bord

 

de la bouche: 2 cm)

300 Hz - 5 kHz, conforme à DO-214

Niveau de pression acoustique

max. 120 dB (distorsion 1 %)

Tension de sortie

 

400 mV ± 3 dB à 114 dB à 6 mm

 

 

de distance (conforme à DO-214)

Impédance de charge

150 Ω

Tension d´alimentation

8 - 16 V DC, approx. 8-25 mA,

 

 

connexions selon RTCA/DO 214

 

 

Caractéristiques générales

Pression exercée par les écouteurs

approx. 2,5 N

Poids sans câble

 

170 g

câble

 

eunilatéral, longueur totale 1,8 m

Connecteurs

HMEC 25-KA

connecteur stéreo 6,3 mm (casque)

 

 

câblage mono

 

 

PJ-068, 5,25 mm (microphone)

 

HMEC 25-CA

XLR-5

Alimentation

 

2 piles alcali-manganèse, 1,5 V type LR 6

 

 

(2700 mAh)

Autonomie

 

piles: approx. 20 h

Témoin

 

LED bi-couleur comme contrôle piles

Rumore - Dove nonv lo incontriamo ?

Sia sul posto di lavoro che nell'ambiente domestico, nei mezzi di trasporto pubblici, nei viaggi in aereoplano, in ferrovia o in pullman - esso ci accompagna dovunque.

Gli effetti negativi di questi rumori fastidiosi sono comprovati da studi effettuati e anche ciascuno di noi li avrà già provati.

￿nervosismo

￿mancanza di concentrazione

￿irritabilità...

sono solo gli effetti più appariscenti sull'organismo. Il rumore agisce inoltre sul sistema neurovegetativo e può provocare danni permanenti all'udito.

Le fonti di rumore sono molteplici e troppo spesso non eliminabili per il singolo individuo. Per questo motivo solo la protezione personale in un luogo rumoroso può rappresentare una soluzione.

Con il sistema NoiseGardla Sennheiser ha realizzato una soluzione efficace. Il principio di funzionamento e l'impiego Vi vengono spiegati in queste istruzioni.

Livello di pressione acustica delle sorgenti sonore

 

140 dB

Motore a reazione (distanza 25 m)

Rumoroso

130 dB

Motore di aeroplane

120 dB

Martello pneumatico

 

 

110 dB

Martello fucinatura, betoniera

 

100 dB

Macchina per pressofusione di metalli

 

 

 

 

90 dB

Officina metalmeccacica

 

80 dB

Trattore

 

 

 

 

70 dB

Ufficio

 

60 dB

Conversazione

 

 

 

 

50 dB

Rumore ambientale

 

40 dB

Soggiorno

 

 

 

Silenzioso

30 dB

Biblioteca

20 dB

Camera da letto

 

 

 

 

 

10 dB

Bosco, senza vento

L'unità di misura per il livello di pressione acustica è il decibel (dB). Un'attenuazione del rumore di 10 dB viene generalmente percepita come un dimezzamento del volume, un'attenuazione di altri 10 dB fornisce una percezione sonora ridotta del 75% ecc.

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Sennheiser HMEC 25-CA Microphone, préamplificateur inclus, Caractéristiques générales, Rumore Dove nonv lo incontriamo ?

HMEC 25-KA, HMEC 25-CA specifications

The Sennheiser HMEC 25-CA is a professional-grade closed-back headset designed to deliver exceptional audio quality and comfort for users in various demanding environments, including aviation, broadcasting, and military applications. Renowned for its robust construction and advanced technology, this headset has become a trusted choice among professionals who require reliable communication and accurate audio reproduction.

One of the standout features of the HMEC 25-CA is its closed-back design, which provides excellent passive noise isolation. This characteristic is crucial for users in noisy environments, as it helps to minimize external sounds and allows for clear communication and focus on the task at hand. The comfortable ear cushions contribute to prolonged wearability, ensuring that users can remain engaged for extended periods without experiencing discomfort.

The headset is equipped with noise-canceling technology, allowing it to effectively suppress background noise while enhancing voice clarity. This feature is particularly beneficial in aviation and military scenarios where clear communication is critical. Whether communicating with a co-pilot or coordinating with team members, users can rely on the HMEC 25-CA to deliver crystal-clear audio.

Another important aspect of the HMEC 25-CA is its versatility. The headset is compatible with various communication systems, making it suitable for a wide range of applications. Additionally, its dual plug configuration ensures easy connectivity to different devices, enhancing its functionality across platforms.

The adjustable headband and rotating ear cups further improve the user experience, allowing for a personalized fit and optimal comfort. The durable construction of the headset also means it can withstand the rigors of professional use, ensuring longevity and reliability even in challenging environments.

In summary, the Sennheiser HMEC 25-CA is a top-tier headset that combines comfort, advanced noise-canceling capabilities, and versatile connectivity. Its robust design and high-quality audio performance make it a favorite among professionals who require dependable communication equipment. Whether used in aviation, broadcasting, or other critical fields, the HMEC 25-CA stands out as a reliable companion, ensuring that users can communicate effectively without compromise.