FAQ

Which microphone should be used for recording natural sounds (o-Ton/ambient sound)?

All OKM Classic varieties are suitable for this purpose, since they are the sensitive versions. When recording natural sounds, the microphone must accurately record the acoustic impressions of the person doing the recording. The sensitive Classic version is required when attempting to record bird songs, for instance, since the person doing the recording is often unable able to get as close as s/he wants to the source of the sound. With very quiet sources of sound and/or very large distances, the sensitive microphone jack of the recording equipment should be used. Yet despite this, a certain amount of microphone preamplifier feedback may not be able to be avoided (depending on the type of equipment used).

Is it necessary to buy the complete version, including the A 3 adapter for this purpose?
No, the respective solo version is sufficient, since the 96 dB distortion threshold is rarely reached during these recordings.

How can I avoid noises on my recordings if I record  ambient sounds on windy days?

Soundman has produced in cooperation with Rycote GB an windshield which close round the ears.Around the ears will be a perfect windless area.  You can record with the Soundman windshield without noises even in the middle of a storm.

For which recordings should I buy the more expensive complete version, including the A 3 adapter?
Almost all portable recording equipment has a T-feed, which supplies the microphone with 1.6 V power. However, this voltage is only sufficient for a volume of 105 dB. For higher decibel levels, the microphone need to be supplied with a higher voltage, which is supplied by the adapter.

What does 105  dB sound like?
This would be, roughly speaking, the volume of a woodwind instrument at a distance of 1 meter.

I am having bass-range distortions even though I have the right settings (max. 0 dB)!
The energy supplied to the microphone via the T-feed is not sufficient to process the bass tones. Either the adapter must be used, or for very high volumes, the “Rock” version must be selected.

My microphone does not function with my recording equipment!
It is very rare, but there is recording equipment that is not equipped with power supply for microphones (T-feed – plug in power -). In this case, the A 3 must be used both for the Mic jack and for the LINE IN jack.

Can I also use different microphones with the A 3 adapter via my recorder’s LINE-IN jack?
Unfortunately not, since, to our knowledge, the OKM microphone, together with the A 3 adapter, is the only “Elektret” microphone that works via the Line-in jack. The adapter is coordinated with the OKM microphone, and will only work if there is a preamplifier together with it.

For what purposes was the OKM Pop/AV built, and how does it differ from the Classic version?
All Pop/AV OKM microphones are 3 dB less sensitive than the Classic version. This allows them to be used for higher volumes, where only the “Rock” version would otherwise provide undistorted recordings.

What does the “AV” in this version stand for?
The new digital camera technology presented many users with the problem of obtaining sound quality that was as good as the picture quality. Since all digital cameras (except for professional versions) are only equipped with automatic sound regulators, this automatic regulation has caused problems. This is especially the case for highly sensitive microphones such as the OKM Classic, and particularly when dealing with highly dynamic sound sources. Here, the somewhat less sensitive OKM II PoP/AV, without the A 3 adapter, should be used, as long as there is T-feed via the microphone jack.

What are the differences between the variant OKM II and the various Studio versions?
The respective Studio variants are selected microphones with channel synchronisation of less than 0.5 dB between the left and right. This selection takes place in the frequencies relevant for stereo listening. The result is minimised channel deviation which provides more transparent sound, especially for recordings that are made in areas with good acoustics.

What recordings should be made by  OKM “Rock/Classic” microphone?
The newest version of Rock/Classic microphones are using Sennheiser capsuls. With this version you can record music with low sound pressure as well as music with very high sound pressure like hardrock music. Some classic instruments like piano and organ can produce a sounds with  a wide range of dynamic . If  silent parts as well as very loud music should be recorded without any danger of distortions the rock-classic is the fitting version.

Where should I stand when recording a concert?
Generally, you should stand near the mixer, which is normally located in the centre of the room. Since all Original Headset microphones make spatial recordings, room acoustics is a substantial determinant of recording quality.

What applications is OKM I intended for?
The OKM I has a worse level of channel deviation and sensitivity than version II. It is is intended for recording speech and music for analogue recording devices and dictation recorders. The OKM II and other versions above up are recommended for high-quality digital recording devices, such as the relatively inexpensive minidisk recorders.

Will my pulse be recorded when I wear the microphone in my ear?
No, the microphone capsules hang freely, and have no direct contact with the ear.

Can I connect the OKM microphone to my computer’s sound card?
As with MC recorders, the microphone jacks of sound cards are generally equipped with T-feed. Therefore, OKM microphones will also work with sound cards.

 I would like to connect my OKM with A 3 adapter to my home stereo system. How can that be done and how can I prevent the A 3’s battery power from constantly going down?
The adapter only needs to be equipped with a 3.5 mm coupling on 2 x chinch in order to be connected to all Line-In jacks on a home stereo system.  You should still use the battery inside of the adapter. Nearby all converters will produce noises on the recordings.

Can OKM microphone recordings be played on home stereo speakers?
If the OKM microphone was worn in the ears while the recording was made, earphone playback is recommended, as this will allow for exact 3-D spatial playback. Since all OKM microphones are corrected for the free sound field, the recordings can also be played via a stereo system. However, this will not provide the same spatial effect as headphones.

Can I connect my OKM mics on the new iphone and other Apple mobils and PDAs?

Until the end of 2014 an interface from Tascam iJX2 was available. This interface is not available  furthermore.

We are looking for another solution to record in good quality with your mobile using Soundman binaural microphones.

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