Directional loudspeaker test

We would like to provide some additional information regarding our EASE files as we represent our products differently than other manufacturers. Linear Peak SPL will be When using standard playback material music or speech rather than pink noise each product will be able to achieve a few additional dB than what is shown. Refer to the B-Noise paper. Fill and spot coverage for systems with space limitations and visibility concerns such as clubs, restaurants, portable AV, or galleries or museum displays.

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• Research Resources
• Directional properties of the loudspeaker systems with analog and digitalcrossover networks
• SP sonic Omni 12
• Black Bosch LBD3905 12W Bi-directional Cabinet Loudspeaker, 18W
• omnidirectional loudspeakers = best design available
• Testing Loudspeakers: Which Measurements Matter, Part 2
• LS1-OC100E Bosch Hemi-directional Loudspeaker
• Qohm Ultra-Lightweight Compact Dodecahedron Speaker

WATCH RELATED VIDEO: Parametric Speaker Test

Research Resources

IEC E determines of the performance of directional loudspeaker array systems, compares these system types, and determines their proper practical application, by listing the characteristics which are useful for their specification. It specifies uniform measurement methods for these characteristics. IEC Edition 1. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form.

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Stay up to date on all new IEC publications. Available online and If you wish to give us your feedback on this publication or. Annex A informative Example of standard specifications for a personal audio space Figure 1 — Personal acoustic zone Figure 2 — Personal acoustic zone and sound pressure level Figure 3 — Measuring points of the personal acoustic zone Table 1 — Characteristics to be specified Table A.

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Any divergence. Independent certification bodies provide conformity. IEC is not responsible for any. Use of the referenced publications is. Your shopping cart is empty! BACK Feb 01 Abstract Quality evaluation method for the sound field of directional loudspeaker array system IEC E determines of the performance of directional loudspeaker array systems, compares these system types, and determines their proper practical application, by listing the characteristics which are useful for their specification.

Publication Date. Technical Committee. TA 20 - Analogue and digital audio. Current Stage. Completion Date. Ref Project. Buy Standard. IEC - Quality evaluation method for the sound field of directional loudspeaker array system.

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International Standard IEC has been prepared by subcommittee subcommittee technical area Quality for audio, video and multimedia systems, of IEC technical committee technical committee Audio, video and multimedia systems and equipment. A bilingual version of this publication may be issued at a later date. This system is convenient for consumers who want to listen to sound without earphones or headphones. This system would be widely used in consumer electronics, for example, smart phone or pad, TV, computer, navigator, and game machine.

The applicable area for the system could be fitness club, exhibition room, museum, shopping mall, and etc. A simple and easy concept is needed to evaluate the performance of the directional loudspeaker array system for a consumer.

It will provide consumers with personalized audio space criteria in order to compare the audio sound field quality between various electronic products that have a directional loudspeaker array system.

It is important to specify the quality evaluation method for the personal audio space and the concept of personal audio space. This standard provides guidelines for general test methods to evaluate the quality of directional loudspeaker array systems.

This standard deals with the determination of the performance of directional l This May Also Interest You. IEC specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also details the characteristics to be specified by the manufacturer.

It applies to sound system microphones for all applications for speech and music. It does not apply to measurement microphones, but it does apply to each audio channel of microphones having more than one channel, for example for stereo or similar use.

It is also applicable to flush-mounted microphones and to the analogue characteristics of microphones with digital audio output. For the purposes of this International Standard, a microphone includes all such devices as transformers, pre-amplifiers, or other elements that form an integral part of the microphone, up to the output terminals specified by the manufacturer.

The major characteristics of a microphone are considered in Clauses 6 to Additional characteristics are considered in Annex A and Annex C. IEC cancels and replaces the fifth edition published in This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a subclause Sound system equipment - Electroacoustical transducers - Measurement of large signal parameters.

IEC E applies to transducers such as loudspeaker drive units, loudspeaker systems, headphones, micro-speakers, shakers and other actuators using either an electro-dynamical or electro-magnetic motor coupled with a mechanical suspension.

The large signal behaviour of the transducer is modelled by a lumped parameter model considering dominant nonlinearities such as force factor, stiffness and inductance. It defines the basic terms and parameters of the model, the methods of measurements and the way the results should be reported. It constitutes a technical revision. The main changes are: - descriptions of the methods of measurement are adjusted to the state of the technology; - addition of Clauses 4 to 15; - integration of Annex A in the main body of the standard; - overall textual review.

Sound system equipment - Electroacoustical transducers - Measurement of suspension parts. IEC E applies to the suspension parts of electroacoustic transducers for example, loudspeakers.

It defines the parameters and measurement method to determine the properties of suspension parts like spiders, surrounds, diaphragms or cones before being assembled in the transducer. The measurement results are needed for engineering design purposes and for quality control. Furthermore, this method is intended to improve the correlation of measurements between suspension-part manufacturers and loudspeaker manufacturers. The measurement methods provide parameters based on linear and nonlinear modelling of the suspension part and uses both static and dynamic techniques.

The main changes are: - descriptions of the methods of measurement are adjusted to the state of the technology; - addition of Clauses 5 to 13; - integration of Annex A in the main body of the standard; - overall textual review.

The contents of the corrigendum of November have been included in this copy. Household high-fidelity audio equipment and systems - Methods of measuring and specifying the performance - Part 6: Listening tests on loudspeakers - Single stimulus ratings and paired comparisons.

Applies to loudspeakers conforming to IEC and intended for home use to establish standards for comparison of the sound characteristics of various loudspeakers with each other.

Directional properties of the loudspeaker systems with analog and digitalcrossover networks

Background: Assessments of hearing aid HA benefits in the laboratory often do not accurately reflect real-life experience. This may be improved by employing loudspeaker-based virtual sound environments VSEs that provide more realistic acoustic scenarios. It is unclear how far the limited accuracy of these VSEs influences measures of subjective performance. Research design: A cocktail-party scene was created inside a meeting room and then reproduced with a channel loudspeaker array inside an anechoic chamber.

SP sonic Omni 12

This project aims to develop new loudspeaker arrays that will generate high-quality sound in precisely-targeted directions for use in mobile phones and other applications. Generating audio sound in a specific direction is useful for mobile phones, museums, retail stores and digital signage, but difficult to achieve in the low frequency range. Parametric array loudspeakers PAL use ultrasonics to deliver sound in a narrow laser-like beam, however the pressure level is often low. The challenge lies in developing new PAL loudspeakers that work well at low frequencies. Using an anechoic chamber — a room designed to completely absorb the reflections of either sound or electromagnetic waves — the UTS Tech Lab team is investigating the directional performance and efficiency of parametric array speakers with the aim of designing a new device with superior performance in generating high-quality, precisely-targeted sound. Tech Lab. Integrated directional sound reproduction with parametric array loudspeakers. Duration 1 year. Lab Acoustics.

Black Bosch LBD3905 12W Bi-directional Cabinet Loudspeaker, 18W

Remember when you wanted to blast music on your speaker at home but your dad kept yelling at you to keep it down? How about if I told you there were speakers that could channel their sound in a tight beam, so you can only hear the music if the speaker is pointed at you. They throw audio in a beam, like a flashlight focuses light in a beam, illuminating only what you point it at. The SRAY work similarly with sound.

omnidirectional loudspeakers = best design available

Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Audio near-distance directional loudspeaker technology for portable multimedia devices Abstract: Utilization modes for micro audio near-distance directional loudspeaker in portable multimedia devices are investigated to examine a novel auditory experience. This novel loudspeaker can provide private listening service by emitting the audible sound with high directivity.

Testing Loudspeakers: Which Measurements Matter, Part 2

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. This is basic document that explain about sound waves in extreme condition audibility when we modulate the high frequency ultra-sounds with the low frequency audio signals. By super-hetrodyne receivers we can build this thing in reality by mixing those signals to get audibility and directionality by going to audible frequency and we making that to audible by this technique.

LS1-OC100E Bosch Hemi-directional Loudspeaker

Either your web browser doesn't support Javascript or it is currently turned off. In the latter case, please turn on Javascript support in your web browser and reload this page. Omnidirectional sound sources are needed to perform a large variety of tests in acoustics.

Qohm Ultra-Lightweight Compact Dodecahedron Speaker

RELATED VIDEO: Directional speaker product demonstration

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Oct 6, Practice Management. With the advent of effective directional microphones in hearing aids came a need for effective tools for evaluating the real-world performance of these devices. Field trials relying on self-report by end-users can be costly and time-consuming, potentially impeding the development of new and better products. Performance trials conducted in laboratories, if shown to yield results that accurately reflect real-world performance, can offer far greater efficiency and cost-effectiveness compared to field trials. This system has been shown to provide accurate simulations of real-world acoustic environments, while offering the advantages of efficiency, control, and repeatability found only in a laboratory. This article will review the development of the system, will describe how the system works, and will present data from two studies that showed that speech intelligibility results obtained in the system are very similar to those obtained in actual noisy environments.

Loudspeaker measurement is the practice of determining the behaviour of loudspeakers by measuring various aspects of performance. This measurement is especially important because loudspeakers, being transducers , have a higher level of distortion than other audio system components used in playback or sound reinforcement. One way to test a loudspeaker requires an anechoic chamber , with an acoustically transparent floor-grid. The measuring microphone is normally mounted on an unobtrusive boom to avoid reflections and positioned 1 metre in front of the drive units on the axis with the high-frequency driver.