Bob asks: Whats the difference between Pro and HD?

Back in 2003 Conversor Pro replaced Conversor F3, as a more modern successor. It has normal boost and zoom modes, just like the F3.
Pro’s “Zoom” directional mic has a sharper sound but its directionality isnt that pronounced. Our clients liked the Pro but it needed something extra, especially in the light of the drastic improvements that have been made in digital hearing aids.
HD microphone brings the massive improvement.
Pro has Boost (for quiet situations) and Zoom (to focus a bit on specific directions)
HD still has Boost (for quiet situations) but Zoom has been replaced by Noise Cancelling (for noisy sittuations) Actually this is EXACTLY how the F3 microphone used to work, although today its done digitally whereas the F3 did it mechanically/acoustically.
With HD, you now have Normal, Quiet mode (boost) and Noisy (noise cancelling) modes Each easily selected by a single button press.

HD is even easier to use, to understand, and with its superb performance in a noise (party, or restaurant, or with people all around) HD allows you to hear the nearby person clearly above the noise.

Conversor HD testing breakthrough

We tested HD in a living room, with a 55″ Sony TV playing its program with the volume set to 100.
Without Conversor HD it was not possible for anyone to talk, including the hearing and the hearing impaired people.
Using Conversor HD in conjunction with his ReSound aids, the profoundly deaf subject was able to communicate clearly although the rest of us couldn’t hear a word!

Conversor product improvements

At Conversor we are constantly looking for ways to improve our products.
These products are here to help you.
You asked “Please can you increase the noise rejection?”
Well we’ve done just that!
This Autumn we will be launching our best microphone yet…. Conversor HD.
Conversor HD has a new “Gold” transducer assembly, which actively cancels distant sounds and favours close sounds.
Conversor HD is another leap forward in hearing speech in a noisy environment.


SO one of our customers wanted to project a movie out of a laptop, for the youth group…. and found a really neat method of connecting the laptop audio to the Church sound system….

To get the sound out of the laptop, use the LISTENOR PRO AUDIO CABLE from the laptop EARPHONE output to plug into your radio mic beltpack transmitter input socket.

Listenor Pro audio cable reduces the laptop signal level to be correct into the microphone socket of your radio mic transmitter. This was intended for the Listenor PRo, but it works great with the popular Sennheiser EW series beltpack transmitters or any with the 3.5mm jack input.

conversor pro receiver, assistive listening device

The Best Assistive Listening Device In The UK (Affordable – Portable – Easy To Use)

When it comes to managing hearing loss there is an overwhelming array of products that claim to help people who are deaf or who are hard of hearing. Many cheaper devices are simply amplifiers, which actually compromise any prescription device already in use, often adding noise or distortion too.

Assistive listening devices (also known as ALDs) can make hearing in a crowded or noisy environment a much easier process, and the Conversor Pro works without changing the prescription, instead simply adding a remote microphone to the solution provided by your audiologist. This is she simplest and most effective assistive listening device technology. Used by people who are deaf or hard of hearing across the world, the Conversor Pro has several qualities that make it an ideal choice for customers in the UK.

Efficiency. The Conversor pro reduces background noise. It selectively conveys the “wanted” speech. One of the biggest obstacles for people who are deaf or hard of hearing is that background noise can obscure the conversation or sound that they intend to hear. The Conversor Pro cuts through background noise using a directional microphone, which the user can then hear using their hearing aid or earphones plugged into the discreet receiver.

Portability. The Conversor Pro is small and contains a portable hearing loop. The receiver is worn around the neck and can be easily tucked into clothes for discretion, and the microphone is a small hand-held device that can be used with a wrist strap for convenience. Hearing loops installed in the home fail to help the user once they are out of the house; the Conversor Pro lets the user take their assistive listening device with them wherever they are.

Style. The Conversor Pro assistive listening device is discreet and stylish, with a smooth black casing. This makes it ideal for people who are self conscious about using assistive listening devices, including children and teenagers, perhaps with a mild hearing impairment, who prefer to use earphones plugged into the small receiver, instead of a hearing aid.

Affordability. The Conversor Pro is far more affordable than other assistive listening devices, which can run upwards of £500. Repairs are also excellent value, giving peace of mind to users who may be worried about breakages or maintenance costs.

Customer Service. Conversor Ltd is run by a small team of engineers who have many years’ experience in designing and maintaining assistive listening devices and other hearing products for people who are deaf or hard of hearing. Customers can guarantee a friendly and thorough service, quick affordable repairs and user help advice available by telephone, online chat or email.

The Conversor Pro is the top choice of assistive listening device in the UK for many people who are deaf or hard of hearing. For more information visit our ALD page; to become a distributor call 01483 608 404 or email

5 Reasons You Need A Portable Hearing Loop For Your Church

5 Reasons You Need A Portable Hearing Loop For Your Church

When creating an environment in which your congregation can worship and engage in church life freely, it is important to consider those members who have difficulty hearing or may be deaf. Acquiring a portable hearing loop for your church building is one way to address this need; It can be far better than a permanent hearing loop installation. Here are five reasons why you need a portable hearing loop device such as the Conversor Pro for church.

It can save a lot of money. A permanent church hearing loop installation often involves significant adjustment to carpets and other parts of the church, which incurs cosmetic repair on top of the already expensive hearing loop (this can run into several thousand pounds) plus installation charges. If you have several rooms in your church that require hearing loop installation, this will multiply the costs. Having portable hearing loop devices for your church (such as the Conversor Pro) means that you can use the system in any of the rooms and avoid the maintenance and cosmetic repair costs involved with a installing a church hearing loop system in the building. The Conversor Pro is one of the most cost-effective assistive listening device systems for churches.

There is a high risk of failure with installed church hearing loop systems due to constant activity in the building; furniture or wires being moved for services or events or building maintenance or repairs can pull at or cut through the loop (finding a fault in metres of wire is very time intensive). The permanent systems installed in Churches are seldom checked and are often not even switched ON. A hearing loop failure is very inconvenient for members, whereas having a set of portable hearing loop devices ensures that your church members with hearing impairments are able to have a high quality experience every time they walk in the door.

The Conversor Pro assistive listening devices are excellent for younger members of church with hearing impairments as it sometimes overcomes their need to wear an external hearing aid; earphones that plug into the receiver or an in-ear hearing aid both work excellently with the Conversor Pro. This can make all the difference to young people with hearing difficulties who want to get involved in church life and feel normal.

Portable hearing loops for church save time on installation, repairs and maintenance. With frequent services, meetings and events, the less time that is spent on logistics within the church the better, as it allows members to focus on ministry and fellowship. Keeping a set of Conversor Pro is a quick and simple way to enable members to hear all that is going on, without losing valuable church time.

Each Conversor Pro contains a portable hearing loop, giving your church members greater flexibility and freedom to sit or move around various areas or church rooms without losing the quality of their hearing. They can also be used outside for church socials and functions, even in rented premises, unlike permanent hearing loops installed in church buildings.

We hope that this article has shed some light on the best assistive listening device systems for churches; we believe that using the Conversor Pro as the choice portable hearing loop for your church members is one of the most time and cost effective ways to meet your congregation’s needs and efficiently minister to those with hearing impairment.

We offer discounts for churches wishing to purchase the Conversor Pro. For more information call 01483 608 404 or email

Why smartphones need external microphones to improve the sound quality of voice recordings in lecture halls or school classrooms

There are two microphones on most Android devices and three on the iPhone. On the Android device there is one at the top edge of the phone and one on the bottom edge next to the charging port. On an iPhone there are three microphones, on the front panel at the top, one on the rear of the phone at the top and one on the bottom edge. These microphones are omni-directional microphones and pick up sound from all around the device. If you are trying to record the teacher or lecturer there will be a number of issues with just using the smartphones own microphone.

   1. Distance from the speaker- sound intensity drops according to the inverse square law- if a phone is twice as far away from the speaker as another phone, the sound intensity at the second phone is one quarter of the first phone.

   2. Poor room acoustics will distort any sound received at the phone’s microphone. Sound from the speaker will bounce off the walls, ceiling and floors and arrive a fraction of a second later than sound received directly from the speaker. It has had further to travel and thus arrives later at the phone’s microphone. So instead of getting a clear sound, there will be a spectrum of sound arriving at the microphone making the recording distorted.

   3. Noise between the speaker and the microphone will be picked up by the phone’s microphone. So the more people between the phone and the speaker the more noise will be picked up by the phone. Because the interfering sound is closer to the phone than the speaker it will be competing strongly in terms of volume as a result of the effect of the inverse square law.

    4. Noise to the side of the phone and behind the phone will also be picked up creating more interference.

To reduce the effect of this interference there are two solutions. 

   1. Using a directional microphone can greatly help the sound quality as it can be pointed at the speaker focussing on the direction from which the speaker’s voice is coming from. This will eliminate interference from the side and rear of the phone but will still be subject to noise between the speaker and the phone, and also to the effect of room acoustics. Directional microphones are relatively inexpensive so they are a cost effective solution which will improve the audio quality in a lecture hall or school classroom.

    2. Using a wireless microphone. A wireless microphone comprises a transmitter microphone and a receiver. The transmitter microphone can be placed next to or worn by the speaker and the receiver plugged into the phone using a special connecting cable. This largely overcomes the issues of distance between speaker and phone, the effect of poor room acoustics as the sound has only a short distance to travel before it reaches the wireless microphone, and interference from noise around the phone and between the phone and the speaker is eliminated. They are however, a lot more expensive than the standard directional microphone.

To connect a standard directional or wireless microphone to a smartphone requires an additional cable as the standard stereo plug supplied with most microphones does not work. The smartphone has a 4 pin connection which enables users to connect both audio out to a headset or earphones and a microphone input. However, a 4 pin or TRRS plug is required to make the connection. Conversor manufacture a range of cables and connectors which enable the connection of a range of directional and wireless microphones to a smartphone.

Notetalker 2.0: supporting student productivity

At Notetalker we are constantly working on improving our software in order to meet the needs of every institution and student.

We’re excited to announce the arrival of Notetalker 2.0, which now includes:

– Compatibility with mind mapping tools, such as Mindview, to increase students’ productivity.

– An upgrade to the bookmarking tool to allow students to bookmark video content to strengthen their learning using rich mixed media.

The newest version of Notetalker also offers the functionality for lecturers to curate relevant online content through Wakelet – a social learning platform  – to share with students pre- or post- lecture, supporting research and further study. In addition to this, a transcription service to support HEIs in the creation of high quality lecture notes is also available.

We are available to chat with HE/ FE staff, DSA assessors and AT trainers about different solutions and approaches to ensure every student is supported by Notetalker 2.0.

Get in touch with our team and discover how Notetalker 2.0 can support teaching and learning. We would love to demo the latest version of Notetalker to you and offer you free trial.

Call us today on+44 (0)1483 473810 or email