Playback and Noise Simulation

labO2-V1

labO2-V1 is a universally usable 2-channel equalizer for playback via headphones, speakers, subwoofers, or shakers. The 2-channel equalizer labO2-V1 has an output for electrodynamic headphones and a line output (equalizer: FF, ID, DF, USER). Therefore, labO2-V1 combines the best of both worlds: The integrated headphone equalizer of labP2 and the excitation function of labO2.

The equalizer function allows binaural recordings to be played back with the correct equalization when using the loaded filters. This aurally accurate playback allows the human auditory impression to be incorporated in the assessment of sounds. labO2-V1 is a universal rack version.

To reproduce binaural recordings accurately and realistically, you need high-quality headphones perfectly matched to and equalized by the playback devices you use. HEAD acoustics offers a sensible selection of open and closed electro-dynamic headphones in three price and quality levels for all conceivable demands and requirements. The headphones have ideal sound characteristics, a natural sonic profile, and high timbre faithfulness. 

Depending on the headphone model and the front end, HEAD acoustics offers an individual level calibration and headphone equalization or a model-specific standard equalization to create a sound impression comparable to the original sound field during playback.

HPL

Realistic playback is essential for adequately evaluating product sound quality in a listening studio.

Our HPL active high precision speaker cabinet enables recorded sound to be played back with incredible accuracy. The speakers come very close to the perfect sound transducer and are ideal for equalized playback in listening studios. The results of hearing tests can thus be optimally evaluated. The realistic sound playback allows various scenarios to be run through interactively and any variations to be discussed with management.

The design is much sturdier than conventional wooden housings and virtually free of resonance and vibration. The front and rear panels are made from robust aluminum. The base contains additional spring damping.

HSW

The HSW I and HSW II.1 subwoofers enhance high-quality playback via headphones or speakers. They allow low-frequency components of airborne sound to be taken into account in perceptive sound assessment. This means that perception of the sound played back matches up more closely with reality. To ensure aurally accurate playback, the subwoofers are filtered with a labO2 / labO2-V1 system.

HSW I

In a listening studio, the HSW I subwoofer set completes playback through headphones or speakers with efficiency optimized for the lower frequency range.

HSW II.1

The HSW II.1 subwoofer is ideal for sound playback in a vehicle setting (SoundCar, for example). Its relatively small size means it can be installed in the trunk of the vehicle.

HDA IV

HDA IV is a high-quality distribution amplifier (HDA stands for "Headphone Distribution Amplifier") to which multiple headphones can be connected for binaural playback. Using HDA IV with labO2-V1 playback equalizer ensures acoustically accurate playback. With HDA IV distribution amplifier, custom level calibration for each individual headphone is a standard feature. HDA IV is particularly suited to jury testing with SQala software.

Two versions of the distribution amplifier are available:

• HDA IV.1: Up to 4 dynamic headphones can be connected
• HDA IV.2: Up to 8 dynamic headphones can be connected

BPU Bundle

With the BPU Bundle, you can easily take advantage of the benefits of aurally accurate playback - whether alone at a PC or in a listening studio. The playback unit and one of the included headphones, HD CL I.1 (closed) and HD OP I.1 (open), are already matched to each other at the factory by the model-specific standard equalization filter. The playback thus conveys a listening impression comparable to the original sound field without any further configuration.

The headphones HD CL I.1 (closed) and HD OP I.1 (open) serve most playback scenarios and impress with their balanced and contoured sound.

3PASS lab

Fully-automated background noise simulation for testing smartphones and other communication devices.

The 3PASS lab exactly reproduces background noises in different test rooms in terms of level, frequency as well as spatial and temporal distribution in the area of the device under test. Application-specific microphone arrays (MSA I or MSA II) allow to record sound fields and to equalize the multi-channel background noise simulation system. Here, the equalization of the whole system is digital and fully-automated – one of the main advantages of 3PASS lab.

3PASS flex

Fully-automated background noise simulation to test systems with complex microphone setups.

The fully-automated software 3PASS flex enables to simulate precisely background noise in different test rooms or in vehicle cabins in terms of level, frequency as well as spatial and temporal distribution in the area of the device under test. Application-specific microphone arrays (MSA I or MSA II) allow to record sound fields and to equalize the multi-channel background noise simulation system. The benefit of 3PASS flex: Equalization of the whole system is conducted fully-automated and digital.

The playback and recording system is particularly suited for testing systems with multiple distributed microphones or microphone arrays under real-world conditions. These include applications like car hands-free systems, In-Car Communication (ICC) systems, voice-controlled smart home devices, smart speakers, conference systems and televisions. When testing these systems, a good sound field reproduction must be achieved simultaneously at the positions of all microphones used. Therefore, the multi-point noise simulation (MPNS) method is applied.

3PASS reverb

Simulate room reverberation realistically and reproducibly.

The software option 3PASS reverb extends these two software solutions with the ability to realistically and reproducibly simulate room reverberation of a single talker at the position of the device under test in a laboratory.

While an artificial head plays back the direct sound signal, the background noise system covers playback of the reverberation components based on the impulse response from the original room. 3PASS reverb operates with available equalized setups from 3PASS lab and 3PASS flex.

The software option 3PAS reverb in combination with the simulation software 3PASS lab or 3PASS flex, one of the microphone arrays MSA I or MSA II (recording, equalization), the hardware interface labBGN (equalization, playback) as well as loudspeakers and power amplifiers form a powerful complete system for the simulation of background noise and reverberation.