Personal Audio
PC 121 - Sennheiser USA
Article No. 500902
Key Features
- Microphone mute switch
- Perfect for netbooks and laptops
- Wearable on the left or right ear
- Also works with 2.5mm headset jacks (cordless house phones)
VoIP headset - Skype headset
$29.95
Related product
$29.95
General Description
The PC 121 is an over-the-ear, single-sided headset, ideal for heavy internet telephony and laptop use. For an on-ear fit, see the PC 111.
Features
- Robust microphone for exceptional speech intelligibility
- Adjustable microphone position and ear clip
- Wearable over-ear; left or right side
- Perfect for netbooks, speech recognition and VoIP
- Unique soft "ear clip design"
- In-line volume control and microphone mute switch
- Volume control/mic mute detaches for 2.5mm plug use (mobile and XBox 360)
- Skype certified
Delivery Includes
- PC 121
- Adapter cable for laptop/mobile phone use (already attached)
- Earpad
$29.95
Technical Data
| Cable length | 9.8 ft. (3 m) |
| Ear coupling | Single-sided |
| Frequency response | 80 - 15,000 Hz (microphone) |
| Frequency response | 50 - 15,000 Hz (earphone) |
| Nominal impedance | 32 ohms |
| Pick-up pattern | Unidirectional |
| Sound pressure level (SPL) | 114 dB(SPL) |
| Jack plug | dual 3.5mm (1/8") with 2.5mm option (included) |
| UPC code | 615104122697 |
| EAN code | 4044156014869 |
| Dimensions (single) | 9 x 4.5 x 2 inches |
| Weight (single) | 0.49 pounds |
| Dimensions (master carton) | 27.5 x 11 x 9 |
| Weight (master carton) | 7.34 pounds |
| Master carton quantity | 15 |
$29.95
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| UUSB-1 | 005374 |
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Glossary
| Cable length |
| The cable length is usually measured between the anti-kink sleeves of the cable (cable length without connectors). |
| Ear coupling |
| A distinction is made between headphones which are worn on the external ear (supra-aural) and those which surround the ear (circumaural). Open headphones have foam ear pads that rest on the ears or ring pads that surround the ears. Closed headphones, on the other hand, nearly always have circumaural ear pads. |
| Frequency response |
| The frequency response of a microphone is given within the limits defined by the manufacturer. In studio condenser microphones it is generally within the range of between 20 Hz and 20 kHz. |
| Jack plug |
| A common audio connector in consumer electronics and music industry. Available in various diameters; in the hi-fi segment, 1/8" and ¼" are widely used. Poles range from one to four. (Examples: headphone jack or jack of an electric guitar). |
| Nominal impedance |
| See impedance. |
| Pick-up pattern |
| Also known as polar pattern, directivity. According to their acoustic design, microphones differ in their sensitivity towards sound from different directions. Pressure microphones have a sensitivity that is largely independent of direction (omni-directional pick-up pattern). Pressure gradient microphones have the pick-up patterns wide cardioid, cardioid, super-cardioid or figure-of-eight. Interference microphones can be used to achieve a further concentration of the pick-up pattern (lobar pick-up pattern). As a special case, dummy head microphones achieve the pick-up pattern of the human ear/head (dummy head stereo). |
| Sound pressure level (SPL) |
| Due to the impractical numerical values, the sound pressure is usually given as the logarithmic value of the sound pressure level according to the equation: dB SPL = 20 x log (po / 0.00002 Pa). The abbreviation SPL (sound pressure level) is added in order to make a clear distinction from other uses of dB. The reference sound pressure, which is at the same time the threshold of hearing, is then 0 dB SPL. The threshold of pain is 140 dB SPL. A difference in the sound pressure level of 1 dB is just about perceptible, while a doubling of the sound pressure corresponds to 6 dB and a doubling of the volume corresponds to a rise of 10 dB. |
