RU452U1 - Device for individual correction of impaired hearing - Google Patents

Abstract

A device for the individual correction of impaired hearing, containing two microphones connected to a preamplifier, two head phones and a tactile vibrator, the outputs of the preamplifier connected to three channels, the input of the first channel connected to a tunable low-pass filter, the second channel contains a tunable high-pass filter, characterized in that a tunable high-pass filter connected in series with a tunable low-pass filter is introduced into the first telephone channel t, a first power amplifier and a headphone, a tunable low-pass filter to the input of the second telephone channel, the output of which through a tunable high-pass filter is connected to the first power amplifier and the headphone connected in series, in each telephone channel the output signal level indicator is connected to the first power amplifier , the input of the third channel of the tactile vibrator is connected to a correction amplifier, a second power amplifier and a tactile vibrator connected in series .

Description

Device for individual correction of impaired hearing

The utility model relates to sound engineering and can be used in schools and kindergartens of deaf and hard of hearing children for conducting classes to develop auditory perception and the formation of pronunciation skills, as well as for individual lessons at home.

A device for the individual correction of impaired hearing (prospectus MONO-FONOR firm Siemens, Germany), which includes a microphone, pre-amplifier, low frequency control, high-frequency control, output amplifier, head phones and vibrator, is known.

In a Siemens device, the formation of the output signal is ensured by the smooth adjustment of the fine-correcting circuit by the low and high frequency controls and the change in the signal value by the output level controllers. This device does not provide separate output signal formation for each ear.

The closest in technical essence is a device for individual lessons in hearing rehabilitation (Avenue Apparatus Suvag 2c, developed by the center of Suvag, Croatia), which provides the formation of the frequency spectrum and sound intensity of the speech signal, taking into account a personal audiogram.

The Suvag 2c device has two microphones connected to a preamplifier, the direct, low-frequency and high-frequency channels are connected to its three outputs. The forward channel contains an amplifier and a step regulator of signal magnitude.

there is a useful model MPK-HO4N25 / OO

.Ј M $ WWt7

The low-frequency channel contains a tunable low-pass filter with cutoff frequencies of 400, 600, 800, 1000 Hz and a step regulator of the signal value. The high-frequency channel contains a high-pass filter with cut-off frequencies of 2, 3, 4 and about kHz and a step regulator of the signal value. All three channels are connected to a mixer with a regulator of the output signal. An output signal indicator, headphones and a vibrator are connected to the mixer outputs.

The device operates as follows. The signal from the first or second microphone is fed to the input of the pre-amplifier and is distributed on three channels at its output. Two channels with filters from the received signals form the output signals, the frequency spectra of which are determined by the established characteristics of the filters. In the forward channel, the entire frequency spectrum of the incoming signal is amplified. The output signal level in each channel is changed by the signal magnitude regulator. The output signals of all three channels are combined in a mixer. Thus, at the mixer output, the ratio of the spectral components of the resulting signal is established depending on the frequency characteristics and the position of the signal magnitude controllers in each of the three channels. The frequency characteristics are set and the position of the signal magnitude regulators is selected taking into account the generalized data of an individual audiogram for two human ears. The generated output signal is the same for the left and right ear goes to the headphones and vibrator.

Despite the wide possibilities of ho forming the output signal according to the spectrum and sound intensity, this device does not

provides the creation of optimal sound fields for people with the task of a useful model is to improve the quality of the formation of the speech signal in sound reinforcing equipment designed to teach children with hearing impairments.

To ensure optimal conditions for the perception of oral speech, the proposed device allows you to generate a frequency spectrum and adjust the volume of the speech signal, taking into account the characteristics of the residual auditory function of each ear of a deaf person.

In addition, the device makes it possible to transmit acoustic information through the action of vibration on the tissues of the human body, which allows a deaf person to perceive such properties of oral speech as pitch, duration and strength of sound.

This is achieved by the fact that the device contains two microphones, a pre-amplifier with two inputs and three outputs, two telephone channels and a tactile vibrator channel. Each of the telephone channels has a series-connected tunable low-pass and high-pass filters, a first power amplifier, one telephone and an output signal level indicator connected to the first power amplifier. The tactile vibrator channel has a correction amplifier, a second power amplifier and a tactile vibrator connected in series.

The drawing shows a structural diagram of a device for individual correction of impaired hearing. The device contains two microphones 1 and 2 connected to a preamplifier 3, three telephone channels and a tactile vibrator channel are connected to its three outputs.

Each of the telephone channels has sequentially connected tunable low-pass and high-pass 5 frequency filters, a first power amplifier 6 and a telephone 7, as well as an output signal level indicator 8 connected to the first power amplifier.

 A / C 3OS 1461

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The tactile vibrator channel includes a correction amplifier 9, a second power amplifier 1C and a tactile vibrator ii connected in series.

Microphones 1 and 2, designed for one teacher, the second for the student, convert sound vibrations that occur when pronouncing words into electrical signals. The electrical signal from the first or second microphone 1.2 is fed to the input of the pre-amplifier 3. At the output of the pre-amplifier 3, the electrical signal is distributed into three channels: two - telephone and one - tactile vibrator.

Filters of the lower 4 and upper 5 frequencies are used in the telephone channel to form the optimal spectrum of the speech signal. The combined use of the lower 4 and upper 5 frequency filters in one channel allows the formation of the signal spectrum from both low and high frequencies. Changing the frequency characteristics of the telephone channel is carried out by independent switching of the time-consuming elements available in each filter.

From the output of the high-pass filter 5, the signal generated by the spectrum is fed to the first power amplifier c, where it is amplified to the required level. The spectrum-optimized and amplified signal is sent from the first power amplifier 6 to telephone 7. The output signal level is controlled by the level indicator S. The second telephone channel works in a similar way.

Frequency characteristics and the level of the output signal in one telephone channel are set taking into account the data of a personal audiogram for the left ear, in the other - the right.

The signal received from the pre-amplifier 3 in the channel of the tactile vibrator is amplified in the correction amplifier 9 with the necessary frequency correction, then it is amplified in the second power amplifier 1О and is output to the tactile vibrator 11.

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An active vibrator converts an electrical signal into a movement of a working element that acts on human skin receptors, which provides a tactile perception of speech information.

The use of separate channels for each phone and tactile vibrator compares the proposed device from the specified prototype, as it allows you to generate an output signal taking into account the characteristics of the residual auditory function of each deaf ear.

-tf fl / 330MW

Claims (1)

A device for the individual correction of impaired hearing, containing two microphones connected to a preamplifier, two head phones and a tactile vibrator, the outputs of the preamplifier connected to three channels, the input of the first channel connected to a tunable low-pass filter, the second channel contains a tunable high-pass filter, characterized in that a tunable high-pass filter connected in series with a tunable low-pass filter is introduced into the first telephone channel t, a first power amplifier and a headphone, a tunable low-pass filter to the input of the second telephone channel, the output of which through a tunable high-pass filter is connected to the first power amplifier and the headphone connected in series, in each telephone channel the output signal level indicator is connected to the first power amplifier , the input of the third channel of the tactile vibrator is connected to a correction amplifier, a second power amplifier and a tactile vibrator connected in series .